Vaccinia Virus Strain MVA Expressing a Prefusion-Stabilized SARS-CoV-2 Spike Glycoprotein Induces Robust Protection and Prevents Brain Infection in Mouse and Hamster Models.

The COVID-19 pandemic has underscored the importance of swift responses and the necessity of dependable technologies for vaccine development. Our team previously developed a fast cloning system for the modified vaccinia virus Ankara (MVA) vaccine platform. In this study, we reported on the construction and preclinical testing of a recombinant MVA vaccine obtained using this system. We obtained recombinant MVA expressing the unmodified full-length SARS-CoV-2 spike (S) protein containing the D614G amino-acid substitution (MVA-Sdg) and a version expressing a modified S protein containing amino-acid substitutions designed to stabilize the protein a in a pre-fusion conformation (MVA-Spf). S protein expressed by MVA-Sdg was found to be expressed and was correctly processed and transported to the cell surface, where it efficiently produced cell-cell fusion. Version Spf, however, was not proteolytically processed, and despite being transported to the plasma membrane, it failed to induce cell-cell fusion. We assessed both vaccine candidates in prime-boost regimens in the susceptible transgenic K18-human angiotensin-converting enzyme 2 (K18-hACE2) in mice and in golden Syrian hamsters. Robust immunity and protection from disease was induced with either vaccine in both animal models. Remarkably, the MVA-Spf vaccine candidate produced higher levels of antibodies, a stronger T cell response, and a higher degree of protection from challenge. In addition, the level of SARS-CoV-2 in the brain of MVA-Spf inoculated mice was decreased to undetectable levels. Those results add to our current experience and range of vaccine vectors and technologies for developing a safe and effective COVID-19 vaccine.

Establishment of reference intervals for complete blood count in times of COVID-19 and vaccination.

Introduction: COVID-19 and vaccination may affect some parameters of the complete blood count (CBC). The aim of this study was to determine reference intervals (RI) of CBC in healthy population with different COVID-19 and vaccination backgrounds and compare them with those established previously. Materials and methods: A cross-sectional study was conducted in donors who attended the Traumatology Hospital "Dr. Victorio de la Fuente Narváez" (HTVFN) from June to September 2021. Reference intervals were established using the non-parametric method on Sysmex XN-1000. For differences between groups with different COVID-19 and vaccination backgrounds, non-parametric tests were used. Results: The RI were established in 156 men and 128 women. Haemoglobin (Hb), haematocrit (Hct), red blood cells (RBC), platelets (Plt), mean platelets volume (MPV), monocytes and relative neutrophils were higher in men than women (P < 0.001). The percentiles of Hb, Hct, RBC, MPV and relative monocytes showed higher values; Plt, white blood cells (WBC), lymphocytes, monocytes, neutrophils, eosinophils and absolute basophils, the 2.5th was higher and the 97.5th was lower; for lymphocytes and relative neutrophils, both percentiles had a trend toward lower values, compared to previous RI. Differences between groups with different COVID-19 and vaccination backgrounds, in lymphocytes (P = 0.038), neutrophils (P = 0.017) and eosinophils (P = 0.018) in men; Hct (P = 0.014), RDW (P = 0.023) in women and MPV (P = 0.001) in both, were not considered pathological. Conclusions: The RI for the CBC were established in a Mestizo-Mexican population with different COVID-19 and vaccination backgrounds, so should be updated and validated in different hospitals close to the HTVFN that use the same analyser.

Telephonic Follow-up and the Risk of Death in Ambulatory Patients with COVID-19.

BACKGROUND: Primary care level close monitoring of mild COVID-19 patients has shown to provide a risk reduction in hospitalization and death. We aimed to compare the risk of all-cause death among COVID-19 ambulatory patients who received and did not receive telephonic follow-up in primary health care settings. METHODS: A secondary database analysis, 2-group comparative study, was conducted with data from the medical information systems of the Mexican Institute of Social Security. A total of 1,498,808 ambulatory patients aged 20 years old and over and with laboratory confirmed SARS-CoV-2 by PCR or rapid antigen test were analyzed. Of them, 535,898 (35.8%) where followed by telephonic calls. The cases were attended from October 14, 2020, to April 10, 2022. Death incidence was evaluated. To assess the association between death and telephonic follow-up we calculated risk ratio using a multivariate logistic model. RESULTS: Case fatality rate was 1.29% in the patients who received telephonic follow-up and 2.95% in the cases who did not receive phone calls. Medical history of chronic kidney disease, COPD, cardiovascular disease, tobacco consumption and diabetes were associated with increased risk of death. In the multivariate model, telephonic follow-up was associated with lower risk of all-cause death, with an adjusted risk ratio of 0.61 (95% confidence interval from 0.59, 0.64). CONCLUSION: Our data suggest that telephonic follow-up is associated with a risk of death reduction in adult outpatients with mild COVID-19, in the context of a multimodal strategy in the primary health care settings.

Resilience and risk factors associated to depressive symptoms in Mexican healthcare workers during the Covid-19 pandemic.

OBJECTIVE: Report the prevalence of depression, resilience, and risk factors among healthcare workers (HCW) during Co-vid-19. MATERIALS AND METHODS: This is an observational cross-sectional study derived from the ongoing international, prospective multicentric study "The COVID-19 HEalth caRe wOrk-Ers Study" (HEROES). A convenience sample of 2 127 HCW was obtained from Chiapas and Jalisco between May 19th and July 24th 2020. Depression was assessed using the Patient Health Questionnaire, resilience with the Brief Resilience Scale and a Covid risk scale was developed. Model-adjusted prevalence ratios (PRs) and an additive interaction model were performed. RESULTS: Moderate-severe depression was found in 16.6% of HCW. Those from Jalisco, physicians, in hospitals, with chronic illness and mental health history were more depressed. The interaction between resilience and risk showed that, compared to those with no risk and medium/high resilience, HCW at risk with medium/high resilience had a 2.38 PR for depression while those at risk and low resilience had a PR of 5.83. CONCLUSION: This evidence points the need to develop strategies to enhance resilience and reduce the risk in HCW.

A Comparison of Working Conditions and Workers' Perceptions among On-Site, Telework, and Hybrid Workers in Ecuador during the COVID-19 Pandemic.

The COVID-19 pandemic has forced many companies to adopt different work modalities to ensure their operation during this period. In this study, we described and compared working conditions and perceptions among face-to-face workers, teleworkers, and hybrid workers in Ecuador. A cross-sectional study was conducted with a sample of 542 participants, using a self-report survey to assess sociodemographic data, working conditions, and workers' perceptions. Variables were described and then compared by the Chi-square test, ANOVA, and the Kruskal-Wallis test. The results indicated a higher proportion of on-site workers without higher education and in the public sector compared to the other modalities. At the same time, there was evidence of increased perceived productivity. People in the hybrid modality tended to have more than one job, earning a higher monthly salary, perceiving a decrease in productivity, an increase in daily working hours, and a lower capacity for time management. In addition, most teleworkers reported fair working conditions, a dedicated workspace, and easy adaptation to this work mode. This study builds a more in-depth understanding of how workers perceived their working conditions among work modalities for organizational decision-making because the evolution of the COVID-19 pandemic is modifying the ways of working permanently.

Experience with Obese Patients Followed via Telemedicine in a Latin American Tertiary Care Medical Center.

BACKGROUND: Obesity is a major public health concern worldwide. Latin America has experienced rapid growth in obesity incidence during the last few decades. Driven by confinement measures, a telemedicine program was implemented in March 2020 to give continuity to obese patients' care through a weight loss program led by the endocrinology department in a tertiary care medical center in Latin America. OBJECTIVE: This study aimed to describe the clinical experience of using digital health for monitoring and attention of obese patients and description of weight change outcomes of these patients followed via telemedicine during March 2020-December 2020. METHODS: A retrospective cohort study was conducted including 202 patients. A Skillings-Mack test was performed to conduct a subgroup analysis of the medians of the weight over the follow-up period, and a mixed multiple linear regression model was performed to estimate the expected average change in weight over time Results: We observed good adherence to the program, represented by a weight loss of -4.1 kg at three months of follow-up, which was maintained even during the sixth month of follow-up. CONCLUSIONS: Digital Health strategies such as telemedicine can be a helpful tool for both patients and health care providers to support the continuity of care and showing satisfactory results in the management of obese patients.

Procrastination during the COVID-19 Pandemic: A Scoping Review.

Procrastination involves voluntarily or habitually delaying unpleasant tasks for later. It is characterized by short-term benefits and long-term costs. The COVID-19 pandemic set specific circumstances that may have influenced procrastination behavior. This scoping review identified the existing peer-reviewed literature in English or Spanish about procrastination during the COVID-19 pandemic (January 2020 to April 2021) in six electronic databases. To conduct the review, a five-step methodological framework, as well as established PRISMA guidelines, was followed. A total of 101 articles were found. After removing duplicates and reviewing the articles, only 13 were included in the review. Findings indicate that procrastination was studied mostly in academic contexts in various parts of the globe. Procrastination behavior was related to anxiety, distress, time management, self-control, and other variables. There is limited information about interventions to prevent or decrease procrastinating behaviors in the context of confinement or in the living conditions generated by the pandemic. Future research should consider how procrastination evolved during the pandemic using longitudinal methodologies. Individual differences related to procrastination also should be identified, and the evaluation of the efficacy of existing interventions is still needed. This information might help in the creation of appropriate interventions that target detrimental procrastination behaviors.

Critical care ultrasonography during COVID-19 pandemic: The ORACLE protocol.

BACKGROUND: Coronavirus disease 2019 (COVID-19) is characterized by severe lung involvement and hemodynamic alterations. Critical care ultrasonography is vital because it provides real time information for diagnosis and treatment. Suggested protocols for image acquisition and measurements have not yet been evaluated. METHODS: This cross-sectional study was conducted at two centers from 1 April 2020 to 30 May 2020 in adult patients with confirmed COVID-19 infection admitted to the critical care unit. Cardiac and pulmonary evaluations were performed using the ORACLE protocol, specifically designed for this study, to ensure a structured process of image acquisition and limit staff exposure to the infection. RESULTS: Eighty-two consecutively admitted patients were evaluated. Most of the patients were males, with a median age of 56 years, and the most frequent comorbidities were hypertension and type 2 diabetes, and 25% of the patients had severe acute respiratory distress syndrome. The most frequent ultrasonographic findings were elevated pulmonary artery systolic pressure (69.5%), E/e' ratio > 14 (29.3%), and right ventricular dilatation (28%) and dysfunction (26.8%). A high rate of fluid responsiveness (82.9%) was observed. The median score (19 points) on pulmonary ultrasound did not reveal any variation between the groups. Elevated pulmonary artery systolic pressure was associated with higher in-hospital mortality. CONCLUSION: The ORACLE protocol was a feasible, rapid, and safe bedside tool for hemodynamic and respiratory evaluation of patients with COVID-19. Further studies should be performed on the alteration in pulmonary hemodynamics and right ventricular function and its relationship with outcomes.

Recomendaciones en reanimación cardiopulmonar en pacientes con COVID-19

RESUMEN La atención a la parada cardiorrespiratoria en una situación de elevada contagiosidad, como la pandemia por COVID-19, puede condicionar una serie de medidas con el fin de garantizar por un lado, una actuación precoz y eficaz y por otro, una adecuada protección y seguridad de reanimadores, paciente y entorno. Desde el Grupo de Trabajo de Reanimación Cardiopulmonar (RCP) de la Sociedad Española de Cardiología, y tras analizar la situación actual, hemos decidido elaborar este documento con el fin de resumir de forma práctica las principales recomendaciones en el contexto de la RCP durante la pandemia por COVID-19. Estas recomendaciones pueden estar sujetas a cambios posteriores, fruto de la progresiva evidencia y aprendizaje que hemos ido adquiriendo en esta etapa. ABSTRACT Attention to cardiac arrest in a highly contagious situation such as the COVID-19 pandemic may condition some focused measures, on the one hand, prior and effective cardiopulmonary resuscitation (CPR) action, in the other hand an adequate protection and safety of rescuers, patients and the environment. From the Cardiopulmonary Resuscitation Working Group of the Spanish Society of Cardiology, after analyzing the current situation, we have decided to prepare this document in order to summarize in a practical way the main recommendations in the context of CPR during the COVID-19 pandemic. These recommendations may be subject to subsequent changes, as a result of the progression of the evidence and the learning that we have acquired at this stage.