Immunogenicity and reactogenicity of heterologous immunization against SARS CoV-2 using Sputnik V, ChAdOx1-S, BBIBP-CorV, Ad5-nCoV, and mRNA-1273.

Heterologous vaccination against coronavirus disease 2019 (COVID-19) provides a rational strategy to rapidly increase vaccination coverage in many regions of the world. Although data regarding messenger RNA (mRNA) and ChAdOx1 vaccine combinations are available, there is limited information about the combination of these platforms with other vaccines widely used in developing countries, such as BBIBP-CorV and Sputnik V. Here, we assess the immunogenicity and reactogenicity of 15 vaccine combinations in 1,314 participants. We evaluate immunoglobulin G (IgG) anti-spike response and virus neutralizing titers and observe that a number of heterologous vaccine combinations are equivalent or superior to homologous schemes. For all cohorts in this study, the highest antibody response is induced by mRNA-1273 as the second dose. No serious adverse events are detected in any of the schedules analyzed. Our observations provide rational support for the use of different vaccine combinations to achieve wide vaccine coverage in the shortest possible time.

Mixed-reality human-machine-interface for motor learning of physical activities

Regular physical activity reduces the risk of suffering obesity and high blood pressure, and slows down age-related loss of mobility and cognitive capabilities. However, 31% of the world population does not perform even the minimum recommend levels of physical activity to have a healthy life. On top of that, due to the COVID-19 Pandemic prevention measures involving isolation, lockdown, and working-from-home policies, adults have drastically reduced their physical activity by 30%, which further aggravates existing health conditions. In order to encourage exercising at home while still receiving proper instruction, this paper proposes a human-machine interface capable of supporting the motor learning of physical activities by providing training with constant practice of exercises and multimodal feedback. It consists of an interactive mixed-reality environment that does not require a human instructor or specialized facilities. As an application of the system, dance coaching was implemented. The information to be conveyed to the users are feet velocity and position trajectories, as well as the tempo of the desired motion. This is done by providing directional haptic feedback with wearable vibroactuators on the ankles of the user, visual feedback with a floor projection, and aural feedback with a metronome. In order to validate the proposed methodology, an experiment where ballroom dance is taught to 10 novice subjects was performed. Results show that when using the developed multimodal system, position and velocity trajectory errors are reduced by 60% and 37%, respectively, which demonstrates that users can understand and follow the multimodal feedback. After finishing the training and removing the system, users are still able to keep the position and velocity error at 61% and 42% lower than their initial performance, respectively. This fact suggests that subjects are able to retain the motor skills obtained during training. [ FROM AUTHOR] Copyright of Advanced Robotics is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full . (Copyright applies to all s.)

Ethics and administrative jurisprudence of the rights of subjects of research in pandemic (COVID-19): role of the scientific ethics committees: Chile / Ética y jurisprudencia administrativa de los derechos de los sujetos de investigación en pandemia (COVID-19): función de los comités éticos científicos: Chile

RESUMEN: Todo gobierno debe reaccionar rápida y efectivamente ante cualquier pandemia, Chile no es la excepción y apoyado en el estado de Excepción Constitucional, ha tenido que implementar medidas que podrían involucrar poca información sobre las percepciones de las personas y las reacciones durante la implementación de las restricciones. Las instituciones internacionales de salud han determinado que es un deber moral realizar investigaciones que generen evidencia que promuevan y mejoren la atención de la salud y la mitigación de la pandemia, instando a reducir los "obstáculos" prácticos de la revisión ética. Los objetivos de este trabajo fueron analizar desde las perspectivas de las consideraciones éticas y jurídicas, el rol que cumplen los Comités Éticos Científicos en el manejo y la protección de las personas durante la pandemia de la COVID-19. La metodología de trabajo se basó en la recolección de la información de Instituciones nacionales e internacionales de Salud y luego analizarla según la jurisprudencia administrativa del gobierno de Chile. Se concluye que los cambios de criterios que deben observar los CECs en el proceso de revisión de los protocolos de los proyectos de investigación científica, deben velar por proteger los derechos de los pacientes y sujetos de investigación en cuanto puede involucrar información sensible, más aún, si se consideran las graves consecuencias de su transgresión, dar un sentido distinto al que corresponda a las normas sobre derechos de pacientes, puede resultar en "falta de servicio" y eventual vulneración en los derechos del sujeto de investigación. La labor de los CEC, debe realizarse siempre desde una interpretación restrictiva, reconociendo la función pública que cumplen como parte integrante de la labor ética encomendada por el legislador al efecto.

SUMMARY: Every government must react quickly and effectively to any pandemic, Chile is no exception and supported by the state of Constitutional Exception, it has had to implement measures that could involve little information about people's perceptions and reactions during the implementation of the restrictions. International health institutions have determined that it is a moral duty to carry out research that generates evidence that promotes and improves health care and the mitigation of the pandemic, urging to reduce the practical "obstacles" to ethical review. The objective of this study was to analyze from the perspectives of ethical and legal considerations, the role that Scientific Ethics Committees play in the management and protection of people during the COVID-19 pandemic. The methodology used was based on collecting information from national and international Health Institutions and then analyzing it according to the administrative jurisprudence of the Chilean government. It is concluded that the changes in criteria that the CECs must observe in the process of reviewing the protocols of scientific research projects, must ensure the protection of the rights of patients and research subjects insofar as it may involve sensitive information, even more if the serious consequences of its transgression are considered. Giving a different meaning to the one that corresponds may result in "lack of service" and eventual violation of the rights of the research subject. The task of the CEC, must always be carried out from a restrictive interpretation, recognizing the public function that they fulfill as an integral part of the ethical work entrusted by the legislators to that effect.

Longitudinal Study after Sputnik V Vaccination Shows Durable SARS-CoV-2 Neutralizing Antibodies and Reduced Viral Variant Escape to Neutralization over Time.

Recent studies have shown a temporal increase in the neutralizing antibody potency and breadth to SARS-CoV-2 variants in coronavirus disease 2019 (COVID-19) convalescent individuals. Here, we examined longitudinal antibody responses and viral neutralizing capacity to the B.1 lineage virus (Wuhan related), to variants of concern (VOC; Alpha, Beta, Gamma, and Delta), and to a local variant of interest (VOI; Lambda) in volunteers receiving the Sputnik V vaccine in Argentina. Longitudinal serum samples (N = 536) collected from 118 volunteers obtained between January and October 2021 were used. The analysis indicates that while anti-spike IgG levels significantly wane over time, the neutralizing capacity for the Wuhan-related lineages of SARS-CoV-2 and VOC is maintained within 6 months of vaccination. In addition, an improved antibody cross-neutralizing ability for circulating variants of concern (Beta and Gamma) was observed over time postvaccination. The viral variants that displayed higher escape to neutralizing antibodies with respect to the original virus (Beta and Gamma variants) were the ones showing the largest increase in susceptibility to neutralization over time after vaccination. Our observations indicate that serum neutralizing antibodies are maintained for at least 6 months and show a reduction of VOC escape to neutralizing antibodies over time after vaccination. IMPORTANCE Vaccines have been produced in record time for SARS-CoV-2, offering the possibility of halting the global pandemic. However, inequalities in vaccine accessibility in different regions of the world create a need to increase international cooperation. Sputnik V is a recombinant adenovirus-based vaccine that has been widely used in Argentina and other developing countries, but limited information is available about its elicited immune responses. Here, we examined longitudinal antibody levels and viral neutralizing capacity elicited by Sputnik V vaccination. Using a cohort of 118 volunteers, we found that while anti-spike antibodies wane over time, the neutralizing capacity to viral variants of concern and local variants of interest is maintained within 4 months of vaccination. In addition, we observed an increased cross-neutralization activity over time for the Beta and Gamma variants. This study provides valuable information about the immune response generated by a vaccine platform used in many parts of the world.

National Health Systems and COVID-19 Death Toll Doubling Time.

Coronavirus disease 2019 (COVID-19) has placed stress on all National Health Systems (NHSs) worldwide. Recent studies on the disease have evaluated different variables, namely, quarantine models, mitigation efforts, damage to mental health, mortality of the population with chronic diseases, diagnosis, use of masks and social distancing, and mortality based on age. This study focused on the four NHSs recognized by the WHO. These systems are as follows: (1) The Beveridge model, (2) the Bismarck model, (3) the National Health Insurance (NHI) model, and (4) the "Out-of-Pocket" model. The study analyzes the response of the health systems to the pandemic by comparing the time in days required to double the number of disease-related deaths. The statistical analysis was limited to 56 countries representing 70% of the global population. Each country was grouped into the health system defined by the WHO. The study compared the median death toll DT, between health systems using Mood's median test method. The results show high variability of the temporal trends in each group; none of the health systems for the three analyzed periods maintain stable interquartile ranges (IQRs). Nevertheless, the results obtained show similar medians between the study groups. The COVID-19 pandemic saturates health systems regardless of their management structures, and the result measured with the time for doubling death rate variable is similar among the four NHSs.