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 COVID-19 has assumed significant and lasting proportions worldwide.
Following initial cases in the Western mesoregion, the State of Santa Catarina (SC) …

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 …

Coronavirus disease 2019 (COVID-19) pandemic has caused immeasurable impacts on the
health and socioeconomic system. The real-time identification and characterization of new …

The COVID-19 pandemic has already reached more than 110 million people and is
associated with 2.5 million deaths worldwide. Brazil is the third worst-hit country, with …

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 …

From a country with one of the highest SARS-CoV-2 morbidity and mortality rates, Brazil has
implemented one of the most successful vaccination programs. Brazil's first model city …

Background We report a genomic surveillance of SARS-CoV-2 lineages circulating in
Paraná, southern Brazil, from March 2020 to April 2021. Our analysis, based on 333 …

The COVID-19 epidemic in the Amazonas state, Brazil, during 2021 was driven by the
spread of the Variant of Concern (VOC) Gamma (lineage P. 1) and, more recently, of the …

The emergence and global dissemination of Severe Acute Respiratory Syndrome virus 2
(SARS-CoV-2) variants of concern (VOCs) have been described as the main factor driving …