Newest Covid variant causing ‘razor blade throat.’ What to know - The Nimbus variant is is now one of the most prevalent strains of the virus tracked by the CDC ...

India is seeing a rise in COVID-19 cases, with 4,302 active infections as per the Health Ministry on June 4, 2025. The surge is linked to emerging variants NB.1.8.1 and LF.7, while JN.1 remains the ...

Coronavirus or COVID-19 global update statistic chart showing increasing numbers of total cases, deaths.

In a recent study posted to the medRxiv* preprint server, researchers in Sweden investigated coronavirus disease 2019 (COVID-19) severity among unvaccinated adults during the periods of severe ...

Omicron is considered a milder coronavirus, but scientists aren’t so sure Omicron virus particles replicating inside an infected cell in an image from a transmission electron microscope.

Omicron is mutating in giant leaps, with scientists racing to keep up. Its diversity is challenging vaccine efficacy and complicating treatment. But this fall, broad spectrum bivalent vaccines may ...

Researchers assessed the differences between the generation-interval distributions and incubation periods of the SARS-CoV-2 Delta and Omicron variants.

Why Are There So Many Omicron Subvariants—And What Can They Tell Us About the Future of the Pandemic? What to know as two new subvariants—BA.4 and BA.5—are now on the rise throughout the U.S.

The omicron variant, though more transmissible, was thought to be less deadly than delta. But in some states, omicron caused more deaths than delta.

New research suggests that the children younger than age 5 who are infected with the COVID-19 Omicron variant have less risk of severe health outcomes than those infected with the Delta variant.

Correction 10 March 2022 COVID-19: How Omicron overtook Delta in three charts Analysis reveals how much faster Omicron spreads and evades the immune system compared with the previous variant.

How omicron’s mutations make it the most infectious coronavirus variant yet A unique anatomy may have fueled omicron’s dominance ...