We extracted one-year genomic data (August 2020–July 2021) from GISAID EpiCoV™
database and estimated monthly proportions of 11 SARS-CoV-2 variants in various …

Summary Background In 2021, Delta became the predominant SARS-CoV-2 variant
worldwide. While vaccines have effectively prevented COVID-19 hospitalization and death …

The introduction of SARS-CoV-2 variants of concern (VOCs) in Brazil has been associated
with major impacts on the epidemiological and public health scenario. In this study, 291,571 …

Latin America is one of the regions in which the COVID-19 pandemic has a stronger impact,
with more than 72 million reported infections and 1.6 million deaths until June 2022. Since …

Uncontrolled high transmission is driving the continuous evolution of SARS-CoV-2, leading
to the nonstop emergence of the new variants with varying sensitivity to the neutralizing …

Background Since its emergence in Autumn 2020, the SARS-CoV-2 Variant of Concern
(VOC) B. 1.1. 7 (WHO label Alpha) rapidly became the dominant lineage across much of …

Since the declaration of SARS-CoV-2 outbreak as a pandemic, the United Arab Emirates
(UAE) public health authorities have adopted strict measures to reduce transmission as …

The pandemic caused by the new severe acute respiratory syndrome coronavirus 2 (SARS-
CoV-2) is a worldwide public health concern. First confined in China and then disseminated …

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 …

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 …