Importance An overall household secondary attack rate (SAR) of 18.9%(95% CI, 16.2%-
22.0%) through June 17, 2021 was previously reported for SARS-CoV-2. Emerging variants …

The massive scale of the global SARS-CoV-2 sequencing effort created new opportunities
and challenges for understanding SARS-CoV-2 evolution. Rapid detection and assessment …

In late 2021, the Omicron SARS-CoV-2 variant overtook the previously dominant Delta
variant, but the extent to which this transition was driven by immune evasion or a change in …

1 Abstract The Omicron SARS-CoV-2 variant of concern (VOC lineage B. 1.1. 529), which
became dominant in many countries during early 2022, includes several subvariants with …

The Omicron variant of concern (VOC) is a rapidly spreading variant of SARS-CoV-2 that is
likely to overtake the previously dominant Delta VOC in many countries by the end of 2021 …

The persistent COVID-19 pandemic since 2020 has brought an enormous public health
burden to the global society and is accompanied by various evolution of the virus genome …

Summary Background The SARS-CoV-2 Omicron variant became a global concern due to
its rapid spread and displacement of the dominant Delta variant. We hypothesized that part …

Importance As self-collected home antigen tests become widely available, a better
understanding of their performance during the course of SARS-CoV-2 infection is needed …

There is growing evidence that mesenchymal stem cell-derived extracellular vesicles and
exosomes can significantly improve the curative effect of oxidative stress-related diseases …

Importance Investigating how the risk of serious illness after SARS-CoV-2 infection in
children and adolescents has changed as new variants have emerged is essential to inform …