Does vitamin D protect against COVID-19? A narrative review

The pleiotropic effects of Vitamin D (or rather its active metabolite calcitriol) on the immune system and the lung suggest a preventive and therapeutic role for the COVID-19 disease. Epidemiologic studies demonstrate an association between vitamin D deficiency and the incidence of COVID-19 and the severity of the illness. However, reverse causality and other underlying causes (age, obesity) might be responsible for the association.Controlled prospective studies using vitamin D for the prevention of COVID-19 and for the treatment of infected patients demonstrated favourable effects for vitamin D with clinical relevance. However, this could not be confirmed by all studies. Open questions remain: which population groups should be supplemented and what is the optimal dosing regimen for vitamin D?

Serum vitamin D content in children with SARS-CoV-2 infection.

Aim of study. To study the total level of 25-hydroxyvitamin D in children with SARS-CoV-2 infection (COVID-19). Material and Methods. A total of 82 children aged 0-17 diagnosed with SARS-CoV-2 infection were enrolled. Depending on the severity of clinical symptoms, all children were divided into three groups according to the COVID-19 severity: asymptomatic, mild and moderate. The serum level of vitamin D in all patients was tested via the immunochemical method. Results. It was found that children with SARS-CoV-2 infection had lower serum level of vitamin D (29.92 [22.22;28.07] ng/ml) as compared with the control group (36.43 [32.05;44.08] ng/ml;p<0.001). A total of 90% of the children with SARS-CoV-2 infection were diagnosed with insufficiency or deficiency of vitamin D (<30 ng/ml). Only 10 % of the patients had normal levels of vitamin D. The insufficiency of vitamin D was found more often amongst children aged 0-11 and deficiency of total 25-hydroxyvitamin D was more common for children aged 12-17. The difference in serum levels of vitamin D depending on the severity of SARS-CoV-2 infection was not found. Male children with SARS-CoV-2 infection showed lower levels of vitamin D (p=0.013). Conclusion. A total of 90 % of the children with SARS-CoV-2 infection had insufficiency or deficiency of vitamin D regardless of the severity of clinical symptoms.Copyright © 2021, Krasnoyarsk State Medical University. All rights reserved.

Boosting the Immune System with Vitamin D: Special Focus on Prevention of COVID-19 and Complications

In addition to the classical functions of the musculoskeletal system and calcium homeostasis, the function of vitamin D as an immune modulator is well established. The vitamin D receptors and enzymes that metabolize vitamin D are ubiquitously expressed in most cells in the body, including T and B lymphocytes, antigen-presenting cells, monocytes, macrophages and natural killer cells that trigger immune and antimicrobial responses. Many in vitro and in vivo studies revealed that vitamin D promotes tolerogenic immunological action and immune modulation. Vitamin D adequacy positively influences the expression and release of antimicrobial peptides, such as cathelicidin, defensin, and anti-inflammatory cytokines, and reduces the expression of proinflammatory cytokines. Evidence suggestss that vitamin D's protective immunogenic actions reduce the risk, complications, and death from COVID-19. On the contrary, vitamin D deficiency worsened the clinical outcomes of viral respiratory diseases and the COVID-19-related cytokine storm, acute respiratory distress syndrome, and death. The study revealed the need for more preclinical studies and focused on well-designed clinical trials with adequate sizes to understand the role of vitamin D on the pathophysiology of immune disorders and mechanisms of subduing microbial infections, including COVID-19.Copyright © 2023 Bentham Science Publishers.

Should Young Covid-19 Patients be Suplemented with Vitamin D?

It is well known that vitamin D's general immunomodulatory actions are helpful in viral infections and that a shortage is linked to a more serious prognosis for Covid-19. In this sistematic review, we examined the existing literature on evidence as to whether there is also link between vitamin D range levels in pediatric population and the outcome of the Covid-19 infection. We looked for studies that measured vitamin D blood concentrations and examined the effects of vitamin D supplementation in young infected patients. Vitamin D may decrease the risk of respiratory infections in a number of ways through its interactions with numerous cells, including by decreasing viral survival and replication, reducing the cytokine storm, raising angiotensin-converting enzyme 2 concentrations (ACE2) while not damaging the endothelial integrity. The incidence or severity of Covid-19 is linked with blood 25-hydroxyvitamin D concentrations, according to many observational studies. However experimental verification is still needed. Given their safety and broad therapeutic window, vitamin D supplements seem to be an effective way for individuals and doctors to prevent or treat Covid-19. Nonetheless, the outcomes of significant vitamin D randomized controlled trials are further needed.Copyright © 2022 Maria Nicolae et al., published by Sciendo.

Prevention of vitamin D deficiency in children. The state of the problem in the world and in Ukraine.

The article presents current data on the prevalence of vitamin D deficiency and criteria for its deficiency in children in different countries. Vitamin D is recognized as one of the most important vitamins involved in many biochemical processes in the body. Its active metabolites play a key role in calcium absorption, bone mineralization and promote phosphate and magnesium metabolism. At the same time, in addition to affecting mineral metabolism, there is a wide range of conditions in which vitamin D also plays a preventive role. Vitamin D has been shown to play a vital role in innate immunity maintenance and is important in prevention of several diseases, including infections, autoimmune diseases, certain forms of cancer, type 1 and 2 diabetes, and cardiovascular diseases. Vitamin D is of particular importance for newborns and young children. This vitamin is involved in important physiological regulatory processes such as bone metabolism, lung development, maturation of the immune system and differentiation of the nervous system. Vitamin D deficiency increases risks of neonatal sepsis, necrotizing enterocolitis, respiratory distress syndrome, and bronchopulmonary dysplasia. Adequate intake of vitamin D and calcium during childhood can reduce the risk of osteoporosis and other diseases associated with vitamin D deficiency in adults. Recently, vitamin D deficiency has shown to be a potential risk factor for COVID-19 propensity. It has been established that to date most scientific pediatric societies have recognized the need to prevent vitamin D deficiency in healthy children of all ages, but data on the dosage of vitamin D in its prophylactic use differ. Most scientific societies recommend an average of 400-600 IU per day of vitamin D for prophylactic purposes. The analysis of published data shows the need to follow a strategy based on an individual approach, taking into account physiological characteristics, individual requirements and lifestyle.Copyright © 2021 University of Tartu Press. All rights reserved.

Vitamin D deficiency during the COVID-19 pandemic and war in Ukraine

Background. Data from numerous studies indicate a significant prevalence of vitamin D deficiency in Ukraine and the world. In recent years, the Ukrainian medical community has faced two important challenges — the COVID-19 pandemic and the russian aggression, which significantly affected the organization and availability of medical care. Despite the previous epidemiological studies in Ukraine devoted to the vitamin D status, there are no data during the past 5 years that became the background for this re-search. The purpose was to analyze the vitamin D status in the adult population of Ukraine during the COVID-19 pandemic and russian aggression. Materials and methods. Data of the serum level of 25-hydroxyvitamin D (25(OH)D) in 5029 adults aged 20–99 years, who for various reasons applied for its measurement, were retro-spectively analyzed. The analysis was performed depending on the year and month of observation, the age and gender of the subjects, and the 25(OH)D level. Results. The mean serum level of 25(OH)D in the total group was 33.2 [24.1–43.8] ng/ml. The assessment of the number of 25(OH)D tests for 2018–2022 did not reveal any signi-ficant differences in 2018 and 2019 but established a significant decrease during the russian aggression in Ukraine in 2022 (by 55.7 %) compared to 2018, as well as indices during the COVID-19 pandemic (by 21.6 % compared to 2020, by 23.5 % in 2021). During the observation period, it was established a decrease in the vitamin D deficiency proportion from 20.6 % in 2018 to 9.3 % in 2022, and an increase in the proportion of subjects with suboptimal (from 6.6 to 11.4 %, respectively) and high serum concentrations of 25(OH)D (from 2.2 to 12.7 %). Conclusions. Our results indicate a grown serum 25(OH)D level during 2020–2022 in the adult population of Ukraine compared to the indices of previous years and a decreased share of vitamin D deficiency in the Ukrainian population. In ad-dition, a decrease in the number of 25(OH)D level tests was estab-lished, especially during the period of the russian aggression, which should be taken into account during the planning measures to opti-mize the vitamin D status in the adult population of Ukraine. © 2023, Zaslavsky Publishing House. All rights reserved.

Effect of Single High Dose Vitamin D Substitution in Hospitalized COVID-19 Patients with Vitamin D Deficiency on Length of Hospital Stay.

Vitamin D and its role in the coronavirus-19 disease (COVID-19) pandemic has been controversially discussed, with inconclusive evidence about vitamin D3 (cholecalciferol) supplementation in COVID-19 patients. Vitamin D metabolites play an important role in the initiation of the immune response and can be an easily modifiable risk factor in 25-hydroxyvitamin D3 (25(OH)D3)-deficient patients. This is a multicenter, randomized, placebo-controlled double-blind trial to compare the effect of a single high dose of vitamin D3 followed by treatment as usual (TAU) of daily vitamin D3 daily until discharge versus placebo plus TAU in hospitalized patients with COVID-19 and 25(OH)D3-deficiency on length hospital stay. We included 40 patients per group and did not observe a significant difference in the median length of hospital stay (6 days in both groups, p = 0.920). We adjusted the length of stay for COVID-19 risk factors (ß = 0.44; 95% CI: -2.17-2.22), and center (ß = 0.74; 95% CI: -1.25-2.73). The subgroup analysis in patients with severe 25(OH)D3-deficiency (<25 nmol/L) showed a non-significant reduction in the median length of hospital stay in the intervention group (5.5 vs. 9 days, p = 0.299). The competing risk model with death did not reveal significant differences between the group in the length of stay (HR = 0.96, 95% CI 0.62-1.48, p = 0.850). Serum 25(OH)D3 level increased significantly in the intervention group (mean change in nmol/L; intervention: +26.35 vs. control: -2.73, p < 0.001). The intervention with 140,000 IU vitamin D3 + TAU did not significantly shorten the length of hospital stay but was effective and safe for the elevation of serum 25(OH)D3 levels.

The Effect of Weekly 50,000 IU Vitamin D3 Supplements on the Serum Levels of Selected Cytokines Involved in Cytokine Storm: A Randomized Clinical Trial in Adults with Vitamin D Deficiency.

This research aimed to evaluate the effects of high-dose cholecalciferol (VD3) supplements (50,000 IU/week) on selected circulating cytokines associated with cytokine storms in adults with vitamin D deficiency. This clinical trial, based in Jordan, included 50 participants receiving vitamin D3 supplements (50,000 IU/week) for 8 weeks; the exact number was assigned to the control group. Interleukin-6 (IL-6), interleukin-1ß (IL-1ß), interleukin-10 (IL-10), tumor necrotic factor-α (TNF-α), and leptin were measured in serum at baseline and 10 weeks (wash out: 2 weeks). Our results revealed that vitamin D3 supplementation significantly increased the serum levels of 25OHD, IL-6, IL-10, IL-1ß, and leptin compared with baseline. In contrast, the serum level of TNF-α insignificantly increased in the group receiving vitamin D3 supplementation. Although the observations of this trial may refer to a potential negative effect of VD3 supplementation during cytokine storms, further trials are required to clarify the potential benefits of VD3 supplement during cytokine storms.

Clinical Nutrition in Covid-19 Patients-A Systematic Review

Introduction There is currently a lack of evidence on clinical nutrition in Covid-19. Aim of the work: Systematic overview of clinical nutrition in Covid-19. Material and methods A systematic literature search: 2 meta-analyses, 12 systematic reviews and meta-analyses, 9 prospective randomized controlled trials, 3 prospective observational studies, 7 retrospective studies, 25 narrative reviews. Results a) Obese patients have an increased risk of a severe course of the disease, b) there is a connection between obesity and an increased risk of death, c) Covid-19 mortality increases from a BMI>27 kg/m2, in all BMI classes 1,6% per 1 kg/m2 in the event of weight gain, in the case of severe obesity (> 40-45 BMI) by a factor of 1,5 to 2 and per 5 kg/m2, d) the risk of a severe course of Covid-19 increases also with increased visceral fat tissue percentage, total body fat mass and upper abdominal circumference, e) the mortality rate can be 10 times higher in malnourished Covid-19 patients, f) serum albumin provides evidence of a poor course of the disease, g) enteral omega-3 fatty acid intake could stabilize kidney function and improve the outcome, h) foods with a low glycemic index should be preferred, i) vitamin D deficiency should be avoided, daily vitamin D and zinc supplementation can be beneficial, j) one-time high dose vitamin D and enteral vitamin C provide no benefit, but the risk of thrombosis could be reduced and the antibody response enhanced with zinc, k) nutritional intervention reduces mortality. Conclusion Screening and assessment of nutritional status are important in Covid-19 patients. Overall, there are insufficient clinical results on specific nutritional therapy.Copyright © 2022 Georg Thieme Verlag. All rights reserved.

Vitamin D Levels in Hospitalized COVID-19 Patients

Background: Several studies suggest an association between serum Vitamin D levels and outcomes in patients diagnosed with COVID-19. Prevention measures for COVID-19 continue to be one of the best strategies to combat the virus but identification of individuals at high risk will help clinician's direct preventative care to reduce infections and improve outcomes. This work assesses the vitamin D levels of hospitalized COVID-19 patients at one community hospital in central Pennsylvania. Method(s): This prospective study, conducted on adult, hospitalized patients under the care of clinical nutrition services between April 2021 and April 2022. Inclusion criteria included age >18 years, COVID-19 positive by polymerase chain reaction (PCR) test with associated symptoms, and not receiving vitamin D supplementation prior to or during hospital admission (N = 122). Vitamin D 25 hydroxy laboratory values were obtained, and values were interpreted utilizing the recommended range categories: 25(OH)D level >= 30 ng/ml was representative of adequate vitamin D stores, while values between 21-29 ng/ml signified vitamin D insufficiency. A 25(OH)D value <20 ng/ml is indicative of vitamin D deficiency. Result(s): Over 77% (n = 95) of all patients included in study had vitamin D values below the recommended levels, with one half (n = 61) demonstrating vitamin D deficiency. Only 22.1% (n = 27) were found to have values consistent with a blood level deemed adequate. Conclusion(s): Many hospitalized patients with COVID-19 demonstrate vitamin D levels below acceptable ranges, many with vitamin D deficiencies. Identification of these individuals in the community will allow clinicians an opportunity to treat the vitamin insufficiency or deficiency with the goal of preventing infections and potential morbidity or mortality associated with the disease. (Figure Presented).

Vitamin D on COVID-19 Patients During the Pandemic, 2022. A Systematic Review and Meta-Analysis

Numerous connections between the level of vitamin D (Vit-D) and the novel coronavirus disease -19 (COVID-19) have surfaced during the pandemic. So, we conducted this systematic review and meta-analysis to explore the effect of Vit-D deficiency and its supplementation on the clinical outcomes of COVID-19 patients. We looked for relevant articles in Cochrane Library, Scopus, Web Science, PubMed, and EBSCO up until the end of 2022. The Open Meta Analyst software was used to analyze the extracted data. We classified them into two main categories based on their objectives. First, the studies that evaluated the effects of Vit-D deficiency in patients, and lastly, the studies that evaluated Vit-D as a supplement, both on mortality rate, hospitalization duration, ICU admission rate, and mechanical ventilation rate. A total of 8001 COVID-19 patients from 42 studies were included. A high serum Vit-D concentration compared to those with lower levels was associated with a significantly lower mortality rate (RR = 1.5, 95% CI = 1.11: 2.02, p = 0.01). According to the estimated effect of 18 studies, those who took Vit-D supplements had a significantly lower mortality rate, hospitalization duration, ICU admission rate, and mechanical ventilation rate than those who did not. The group receiving Vit-D doses between 50 000 to 100 000 IU had a significantly better clinical outcome compared to lower and higher doses. COVID-19 patients with normal Vit-D levels had significantly lower death rates than those with hypovitaminosis. Vit-D supplements in COVID-19 significantly improved clinical outcomes. Vit-D supplementation between 50 000 to 100 000 IU, in patients with COVID-19 significantly outperformed other doses in terms of mortality. © 2023 The Author(s). Published by Enviro Research Publishers.

Incident New Onset Diabetes after Covid-19 Infection: A National Multicenter Cohort

Background: It is known that survivors of acute SARS-CoV-2 infection can experience a complex disease known as post-acute sequelae of COVID-19 (PASC). The clinical manifestations of acute COVID-19 have been well characterized however less is known about the risk of new onset diabetes mellitus (DM) in the post-acute phase of COVID-19. Method(s): An adult cohort with confirmed COVID-19 (by diagnosis or positive test) and without COVID-19 was sampled from a large national health research network between January 1st, 2020 and July 8th, 2022. We investigated the outcomes of a new diagnosis of DM (type I or II) occurring after COVID-19 through 12 months after infection. Risk estimates [incidence, relative risk (RR), attributable risk] were used to describe the probability of incident post-COVID diabetes. Hazard ratios and 95% confidence intervals were used to describe risk factors associated with new diabetes. Result(s): The 3-month probability of new diabetes was 2.48/1,000 among COVID+ and the relative risk (RR) of new diabetes was highest at 12 months [8.94 (8.54, 9.36)]. Vitamin D deficiency [HR: 1.52 (95% CI: 1.42, 1.63)] was associated with increased risk of T2DM and having vitamin D deficiency with either obesity (BMI > 30 kg/m2) or kidney dysfunction (GFR < 60) was associated with more than five times increased risk of T1DM. Conclusion(s): We observed a large proportion of excess diabetes starting at 3 months post COVID infection. Traditional risk factors for diabetes, omicron variant, and vitamin D deficiency are associated with increased risk of new diabetes outcome. PASC care should involve identification and management of diabetes. (Figure Presented).

Vitamin-D deficiency, the hidden pandemic in sunshine sufficient countries, exacerbating hypocalcaemia in a health worker undergoing thyroidectomy - a global perspective and review of literature

Introduction: Vitamin D deficiency (VDD) is common in young adults even in sunlight sufficient countries. It manifests with subtle and trivial symptoms that are often ignored. Nutritional deficiency due to improper dietary habits, poverty, long hours at work and study are factors. The lockdown during COVID has exacerbated the incidence. We had a patient with VDD who became symptomatic after routine thyroidectomy prompting our review into literature on the global health perspective of VDD. Material and method: - A 21-year-old nursing student developed hypocalcaemia within 24 hours after a routine thyroidectomy. VDD was detected and patient improved after supplementation. Literature was reviewed from Pubmed database for the medical aspects of the problem, from Government archives like the Scientific Advisory Committee on Nutrition, ICMR etc for cause and medical archives including those of paediatric and general health for the impact of disease at the state, national and global level. A global health problem list was prepared and data was reviewed. Discussion: Vitamin D is protective against respiratory infections due to viral aetiology including COVID. However, complete lockdown to prevent spread of COVID, online learning, and work from home culture has reduced sunlight exposure and increased incidence of VDD. Post thyroidectomy hypocalcaemia is common in VDD. Conclusion: Since there is a high prevalence of asymptomatic VDD even in sunshine sufficient countries, it is recommended to screen all patients especially young adults for VDD during routine preoperative work up.

Correlation between Serum Vitamin D3 Levels and Severity of COVID-19, Experience from a COVID-19-Dedicated Tertiary Care Hospital from Western India.

Context: It is postulated that 25(OH)D deficiency is associated with a worse prognosis of COVID-19. Aims: We aimed to find out whether baseline serum 25-hydroxy vitamin D levels were correlated with COVID-19 disease severity or not in Indian population. Settings and Design: It is a prospective observational study. Methods and Material: We prospectively recruited 200 COVID-19-positive adult patients and measured their baseline vitamin D levels on admission and prospectively followed their clinical course for their outcome and correlated the association. Statistical Analysis Used: The continuous data were represented as mean (±SD) or median (IQR), while the categorical data were represented as proportions. Parametric data were analysed using unpaired T-test and ANOVA for two and more than two groups, and for categorical, nonparametric data, Chi-square test were applied. A two-sided P value of <0.05 was considered as statistically significant with 95% confidence interval. Results: Eighty-six per cent (172/200) of patients had hypovitaminosis D (<30 ng/mL). The prevalence of 25(OH) severe deficiency, deficiency and vitamin D insufficiency was 23%, 41% and 22%, respectively. Clinical severity was graded as asymptomatic (11%), mild (14%), moderate (14.5%), severe (37.5%) and critical (22%). Sixty per cent of patients had clinically severe or critical disease requiring oxygen support with eleven per cent (n = 22) mortality overall. Age (P: 0.001), HTN (P: 0.049) and DM (P: 0.018) were negatively associated with clinical severity. No linear association was found between vitamin D levels and clinical severity. Low vitamin D levels had a significant inverse association with inflammatory markers like neutrophil-lymphocyte ratio (NLR, P: 0.012) and IL-6 (P: 0.002). Conclusions: Vitamin D deficiency was not associated with worse outcomes of COVID-19 infection in Indian population.

Vitamin D Levels in the Pre- and Post-COVID-19 Pandemic Periods and Related Confinement at Pediatric Age.

Coronavirus disease 2019 (COVID-19) restrictions have been correlated with vitamin D deficiency in children, but some uncertainties remain. We retrospectively studied vitamin 25-(OH) D blood levels in 2182 Italian children/adolescents hospitalized for various chronic diseases in the year before (n = 1052) and after (n = 1130) the nationwide lockdown. The type of underlying disease, gender, and mean age (91 ± 55 and 91 ± 61 months, respectively) of patients included in the two periods were comparable. Although mean levels were the same (p = 0.24), deficiency status affected a significantly higher number of subjects during the lockdown period than in the pre-COVID period (p = 0.03), particularly in summer (p = 0.02), and there was also a smoothing of seasonal variations in vitamin D levels. Particularly at risk were males (OR = 1.22; p = 0.03), the 1-5 year age group (OR = 1.57; p < 0.01) and the 6-12 year age group (OR = 1.30; p = 0.04). Infants appeared not to be affected (p = 1.00). In the post-COVID period, the risk of vitamin D deficiency was unchanged in disease-specific groups. However, the proportion of deficiency or severe deficiency differed significantly in the subgroup with endocrinopathy (higher; Chi-square p = 0.04), and with respiratory problems and obesity (lower; Chi-square p = 0.01 and p < 0.01, respectively). Conflicting/opposite literature results advocate for further studies to clearly indicate the need for supplementation during possible future periods of confinement.

Association of Vitamin D levels on the Clinical Outcomes of Patients Hospitalized for COVID-19 in a Tertiary Hospital.

Objectives: This study aimed to compare the severity of COVID-19, inflammatory parameters and clinical outcomes among patients with normal and subnormal levels of Vitamin D. Methodology: This is a retrospective cohort study of 135 patients admitted in a tertiary hospital for COVID-19. Patients were grouped according to their Vitamin D level. Primary outcome measure was the composite of all-cause mortality and morbidity. Other outcome measures determined were the comparison among the groups on the severity of COVID-19 infection, changes in inflammatory parameters, length of hospital stay and duration of respiratory support. Results: There was a significant trend of higher ICU admission (p=0.024), mortality (p=0.006) and poor clinical outcome (p=0.009) among the Vitamin D deficient group. No significant difference was found for most of the inflammatory parameters, duration of hospital stay and respiratory support. Overall, patients with deficient, but not insufficient Vitamin D level had 6 times higher odds of composite poor outcome than those with normal Vitamin D (crude OR=5.18, p=0.003; adjusted OR=6.3, p=0.043). Conclusion: The inverse relationship between Vitamin D level and poor composite outcome observed in our study suggests that low Vitamin D may be a risk factor for poor prognosis among patients admitted for COVID-19.

SASA 2023 Congress

The proceedings contain 34 papers. The topics discussed include: comparison of intra-arterial blood pressures versus two noninvasive measuring systems: a cross-sectional analytic study employing Bland-Altman and error grid analyses;prevalence of vitamin D deficiency amongst anesthesia providers at the Universitas Academic Hospital;chemical and physical stability of an admixture of anesthetic drugs;postoperative pulmonary complications in adult surgical patients in low- and middle-income countries: a systematic review and meta-analysis;the prevalence of SARS-CoV-2 infection in an academic department of anesthesiology;evaluation of the use of a 3D printed video laryngoscope for tracheal intubation in a manikin;the prevalence of caregiver anxiety in theatre at universitas academic hospital;the spectrum of disease and short-term outcomes of obstetric patients with cardiac disease at a tertiary hospital in South Africa;and almost 30% reduction in carbon footprint using volatile anesthesia - a quality improvement project introducing low-flow anesthesia in a regional hospital.

Correlates of poor clinical outcomes related to COVID-19 among older people with psychiatric illness - a mixed methods study

Objective: COVID-19 leads to highly variable clinical outcomes among older people with psychiatric and medical co-morbidities. Evidence guiding management of future outbreaks among this vulnerable population in in-patient psychiatry settings are sparse. Hence, we aimed to investigate the correlates of poor clinical outcomes related to COVID-19 and to explore the perspectives of COVID-19 survivors in in-patient psychiatry settings. Method: We investigated the correlates of poor clinical outcomes related to COVID-19 using retrospective chart review of 81 older people in in-patient psychiatry settings. Correlates of clinical outcomes related to COVID-19 were assessed by multiple logistic regression models. Moreover, we explored the perspectives of 10 of those COVID-19 survivors by qualitative interviews. We analysed the qualitative data using thematic analysis. Results: Although 25.9% (n = 21) participants were asymptomatic, there was high COVID-19 related mortality rate (14.8%;n = 12). Vitamin-D deficiency, anticholinergic burden, and isolation policies within psychiatric wards were significantly (P < 0.05) associated with COVID-19 related deaths. Participants emphasised the importance of strengthening local support networks and making vaccination centres more accessible. Conclusions: Reducing anticholinergic prescriptions and improving isolation policies may mitigate poor clinical outcomes. Future research investigating the impact of vitamin-D supplementation on COVID-19 related outcomes are warranted. © The Author(s) 2023.

Cerebellar syndrome as a complication of COVID-19 disease

COVID-19 disease is caused by the new coronavirus SARS-CoV-2. The disease first appeared in China in 2019 and quickly spread throughout the world. It primarily affects the respiratory tract, manifested by fever, cough and the devel-opment of dyspnoea, but the symptoms and complications can affect any organ system. Neurological symptoms include headaches, muscle and joint pain, taste and smell disorders. Complications include inflammatory diseases of the central nervous system, ataxia, peripheral nerve and muscle diseases, worsening of extra-pyramidal diseases, and neuropsychiatric disorders. This paper presents a case report of a 62-year-old man with cere bellar syndrome, ataxia, intentional tremor and hypermetria when dealing with COVID-19 disease.Copyright © 2021 Neuroendocrinology Letters.

On the Aspects of Vitamin D and COVID-19 Infections and Modeling Time-Delay Body's Immune System with Time-Dependent Effects of Vitamin D and Probiotic

This chapter provides a summary of recent views on the aspects of vitamin D levels and the relationship between the prevalence rates of vitamin D deficiency and COVID-19 death toll of several countries in Europe and Asia. The chapter also discusses a new modified time-delay immune system model with time-dependent of the body's immune healthy cells, vitamin D, and probiotic. The model can be used to assess the timely progression of healthy immune cells with the effects of the levels of vitamin D and probiotics supplement. It also can help to predict when the infected cells and virus particles free state can ever be reached as time progresses with and without considering the vitamin D and probiotic supplements. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.