Background The coronavirus disease 2019 (COVID-19) pandemic had and is still having a
tremendous impact on people all over the world, but it has been particularly harsh in South …

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Gamma variant has
been hypothesized to cause more severe illness than previous variants, especially in …

Brazil is the country with the second-largest number of deaths due to the coronavirus
disease-2019 (COVID-19). Two variants of concern (VOCs), Alpha (B. 1.1. 7) and Gamma …

ABSTRACT Background The SARS-CoV-2 P. 1 variant has been considered as “variant of
concern (VOC)” since the end of 2020 when it was firstly identified in the Brazilian state of …

Introduction After three years since the beginning of the pandemic, the new coronavirus
continues to raise several questions regarding its infectious process and host response …

The western mesoregion of the state of Santa Catarina (SC), Southern Brazil, was heavily
affected as a whole by the COVID-19 pandemic in early 2021. This study aimed to evaluate …

Background Since the end of 2020, there has been a great deal of international concern
about the variants of SARS-COV-2 B. 1.1. 7, identified in the United Kingdom; B. 1.351 …

Background: The correct understanding of the epidemiological dynamics of COVID-19,
caused by the SARS-CoV-2, is essential for formulating public policies of disease …

BACKGROUND The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-
CoV-2) variants has become a major concern contributing to increased morbidity and …

Since the first case of COVID-19, Brazil has undergone infection waves with distinct
characteristics. The description of new variants has alerted the emergence of more …