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 emergence of the Brazilian variant of concern, Gamma lineage (P. 1),
impacted the epidemiological profile of COVID-19 cases due to its higher transmissibility …

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 …

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 …

The year of 2021 was marked by the emergence and dispersal of a number of SARS-CoV-2
lineages, resulting in the 'third wave'of COVID-19 in several countries despite the level of …

Background The first case of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-
CoV-2) infection in Rio Grande do Norte, northeastern Brazil, was diagnosed on March 12 …

Abstract The Delta (B. 1.617. 2) variant was the predominant UK circulating SARS-CoV-2
strain between May and December 2021. How Delta infection compares with previous …

COVID-19 was declared a pandemic on 11 March 2020 (AJMC Staff, 2020). By August
2021, it affected more than 210 million people globally (Worldometer, 2021). COVID-19 is …

We analysed 9,030 variant-specific RT-PCR tests performed on SARS-CoV-2-positive
samples collected in France between 31 May and 21 June 2021. This analysis revealed …

Background A novel variant of SARS-CoV-2, the Delta variant of concern (VOC, also known
as lineage B. 1.617. 2), is fast becoming the dominant strain globally. We reported the …