Emerging variants of SARS-CoV-2 have been shown to rapidly replace original circulating
strains in humans soon after they emerged. There is a lack of experimental evidence to …

Abstract Late 2020, SARS-CoV-2 Alpha variant emerged in United Kingdom and gradually
replaced G614 strains initially involved in the global spread of the pandemic. In this study …

Abstract As of February 2022, SARS-CoV-2 is still one of the most serious public health
threats due to its high mortality rate and rapid spread of novel variants. Since the first …

The diversity of SARS-CoV-2 mutations raises the possibility of reinfection of individuals
previously infected with earlier variants, and this risk is further increased by the emergence …

Previous studies have shown that B. 1.351 and other variants have extended the host range
of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to mice. Sustained …

Since its emergence in 2019, circulating populations of the new coronavirus (CoV)
continuously acquired genetic diversity. At the end of 2020, a variant named 20I/501Y. V1 …

During the two-year pandemic of coronavirus disease 2019 (COVID-19), its causative agent,
severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has been evolving. SARS …

SARS-CoV-2 causes disease varying in severity from asymptomatic infections to severe
respiratory distress and death in humans. The viral factors which determine transmissibility …

Dynamic tracking of variant frequencies among viruses circulating in the global pandemic
has revealed the emergence and dominance of a D614G mutation in the SARS-CoV-2 spike …

Since the start of the pandemic at the end of 2019, arising mutations in SARS-CoV-2 have
improved its transmission and ability to circumvent the immunity induced by vaccination and …