The World Health Organization and the Centers for Disease Control and Prevention have both designated beta as a “variant of ...

The delta variant is fueling the COVID-19 surge in the United States, but experts warn that a more dangerous variant could emerge if more Americans don't get vaccinated. Delta is the most recent of ...

Despite the implementation of stringent control measures as the COVID-19 pandemic emerged and the success of new vaccines implemented with unprecedented speed, SARS-CoV-2 rapidly achieved global ...

Cell-type-specific SARS-CoV-2-induced responses in nasal mucosa differ largely between ancestral, Delta and Omicron cases, including the association with severe disease and the cellular and ...

One thing we know for sure about SARS-CoV-2, the virus that causes COVID-19, is that it keeps changing. Since the start of the pandemic, we have seen several notable variants, including Alpha, Beta, ...

Prior COVID-19 vaccination did not stop the immune system from mounting a protective response to the delta and omicron strains, though new mutation-specific antibody production dipped slightly, ...

Figure illustrates the overall symptomatology of Long COVID (panel A), and the shifting prevalence of Long COVID symptoms across SARS-CoV-2 variants, including Wild-type, Alpha, Delta, and Omicron ...