Clinical Course of 53 Previously Vaccinated Patients Admitted to the National Hospital in Warsaw, Poland with COVID-19 Between November 2021 and March 2022.

BACKGROUND Current vaccines against SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) and vaccine booster programs aim to reduce hospitalizations due to severe COVID-19 (coronavirus disease 2019). It is now accepted that vaccination does not completely prevent infection and that breakthrough COVID-19 does occur. This study included 53 vaccinated patients who were hospitalized at a single center in Poland with breakthrough COVID-19 and aimed to evaluate the factors associated with their clinical course. MATERIAL AND METHODS This study covered the period 26 November 2021 to 11 March 2022. All patients had been vaccinated against COVID-19 with one of the following 4 vaccines: the mRNA-1273 (Moderna) mRNA vaccine (Spikevax); the BNT162b2 (Pfizer-BioNTech) mRNA vaccine (nucleoside-modified) (Comirnaty); the Ad26.COV2.S (Janssen/J0ohnson & Johnson) recombinant vaccine (Jcovden); and the AZD1222 (ChAdOx1) (Oxford/AstraZeneca) recombinant vaccine (Vaxzevria). RESULTS The course of COVID-19 in vaccinated patients was relatively similar. The patients vaccinated more than 24 weeks earlier rarely needed a stay in the Intensive Care Unit (ICU) (P=0.021), and the occurrence of deaths was significantly lower in this group (P=0.046). Women remained in hospital considerably longer than men (P=0.011). Age and comorbidities did not affect the course of this infection. CONCLUSIONS Despite the many advantages of the COVID-19 vaccination, our observations indicate a potential risk of infection after vaccination. The assessment of the course of COVID-19 in vaccinated patients gives the possibility to compare different vaccines and indicate factors that can reduce immunity.

Efficacy of oral amantadine among patients hospitalised with COVID-19: A randomised, double-blind, placebo-controlled, multicentre study

Background Amantadine has been proposed as a treatment for COVID-19 because it shows anti-SARS-CoV-2 activity in vitro. However, to date, no controlled study has assessed the safety and efficacy of amantadine in COVID-19. Research question Whether amantadine is effective and safe among patients with different COVID-19 severity classifications. Study design and Methods: This was multi-centre, randomised, placebo-controlled study.Patients with oxygen saturation ≤94% and no need for high-flow oxygen or ventilatory support were randomly allocated to receive oral amantadine or placebo (1:1) for 10 days in addition to standard care. The primary endpoint was time to recovery assessed over 28 days since randomisation, defined as discharge from hospital or no need for supplemental oxygen. Results The study was terminated early due to a lack of efficacy after an interim analysis. Final data from 95 patients who received amantadine (mean age, 60.2 years;65% male;66% with comorbidities) and 91 patients who received placebo (mean age, 55.8 years;60% male;68% with comorbidities) were obtained. The median (95% CI) time to recovery was 10 days both in the amantadine (9–11) and placebo arms (8–11;subhazard ratio = 0.94 [95%CI 0.7–1.3]). The percentage of deaths and percentage of patients who required intensive care at 14 and 28 days did not significantly differ between the amantadine and placebo groups. Interpretation Adding amantadine to standard care in patients hospitalised with COVID-19 did not increase the likelihood of recovery. Clinical trial registration ClinicalTrials.gov;No.: NCT04952519;www.clinicaltrials.gov.

The Course of COVID-19 among Unvaccinated Patients-Data from the National Hospital in Warsaw, Poland.

INTRODUCTION: Studies to date indicate the relatively high effectiveness of vaccinations in preventing severe COVID-19 symptoms. However, in Poland, 40% of the population remains unvaccinated. OBJECTIVE: The objective of this study was to describe the natural history of COVID-19 in unvaccinated hospital patients in Warsaw, Poland. MATERIAL AND METHODS: This study evaluated data from 50 adult patients from the National Hospital in Warsaw, Poland, in the period 26 November 2021 to 11 March 2022. None of these patients had been vaccinated against COVID-19. RESULTS: Analysis showed that the average hospitalisation time for these unvaccinated COVID-19 patients was 13 days. Clinical deterioration was observed in 70% of these patients, 40% required the intensive care unit, and 34% subsequently died prior to the end of the study. CONCLUSIONS: There was a significant deterioration and high mortality rate in the unvaccinated patients. For this reason, it seems prudent to take measures to increase the vaccination coverage level of the population against COVID-19.

Efficacy of oral amantadine among patients hospitalised with COVID-19: A randomised, double-blind, placebo-controlled, multicentre study.

BACKGROUND: Amantadine has been proposed as a treatment for COVID-19 because it shows anti-SARS-CoV-2 activity in vitro. However, to date, no controlled study has assessed the safety and efficacy of amantadine in COVID-19. RESEARCH QUESTION: Whether amantadine is effective and safe among patients with different COVID-19 severity classifications. STUDY DESIGN: and Methods: This was multi-centre, randomised, placebo-controlled study.Patients with oxygen saturation ≤94% and no need for high-flow oxygen or ventilatory support were randomly allocated to receive oral amantadine or placebo (1:1) for 10 days in addition to standard care. The primary endpoint was time to recovery assessed over 28 days since randomisation, defined as discharge from hospital or no need for supplemental oxygen. RESULTS: The study was terminated early due to a lack of efficacy after an interim analysis. Final data from 95 patients who received amantadine (mean age, 60.2 years; 65% male; 66% with comorbidities) and 91 patients who received placebo (mean age, 55.8 years; 60% male; 68% with comorbidities) were obtained. The median (95% CI) time to recovery was 10 days both in the amantadine (9-11) and placebo arms (8-11; subhazard ratio = 0.94 [95%CI 0.7-1.3]). The percentage of deaths and percentage of patients who required intensive care at 14 and 28 days did not significantly differ between the amantadine and placebo groups. INTERPRETATION: Adding amantadine to standard care in patients hospitalised with COVID-19 did not increase the likelihood of recovery. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov; No.: NCT04952519; www. CLINICALTRIALS: gov.

Treatment of acute respiratory failure in the course of COVID-19. Practical hints from the expert panel of the Assembly of Intensive Care and Rehabilitation of the Polish Respiratory Society.

In 2019, a pandemic began due to infection with a novel coronavirus, SARS-CoV-2. In many cases, this coronavirus leads to the development of the COVID-19 disease. Lung damage in the course of this disease often leads to acute hypoxic respiratory failure and may eventually lead to acute respiratory distress syndrome (ARDS). Respiratory failure as a result of COVID-19 can develop very quickly and a small percent of those infected will die because of it. There is currently no treatment for COVID-19, therefore the key therapeutic intervention centers around the symptomatic treatment of respiratory failure. The main therapeutic goal is to main-tain gas exchange, mainly oxygenation, at an appropriate level and prevent the intensification of changes in the lung parenchyma. Depending on the severity of hypoxemia different techniques can be used to improve oxygenation. Medical staff dealing with COVID-19 patients should be familiar with both, methods used to treat respiratory failure and the epidemiological risks arising from their use. In some patients, conventional (passive) oxygen therapy alone is sufficient. In patients with worsening respiratory failure high flow nasal oxygen therapy (HFNOT) may be effective. The continuous positive airway pressure (CPAP) and non-invasive ventilation (NIV) methods can be used to a limited extent. With further disease progression, invasive ventilation must be used and in special situations, extracorporeal membrane oxygenation (ECMO) can also be administered. The authors of this article set themselves the goal of presenting the most current knowledge about the epidemiology and patho-physiology of respiratory failure in COVID-19, as well as the methods of its treatment. Given the dynamics of the developing pandemic, this is not an easy task as new scientific data is presented almost every day. However, we believe the knowledge contained in this study will help doctors care for patients with COVID-19. The main target audience of this study is not so much pneumonologists or intensivists who have extensive experience in the application of the techniques discussed here, but rather doctors of other specializations who must master new skills in order to help patients during the time of a pandemic.