A new variant of the virus that causes COVID-19 is spreading in the U.S., raising concerns about a potential wave of infections and reinfections to start the new year.

A new COVID-19 variant called "Stratus" has been circulating in Oklahoma, and the state's positive test rate has been higher than the national average during the summer months. Stratus is the ...

Covid-19 was never just another cold. We knew it was going to stick around and keep changing to try to get the upper hand on our immune systems. But we've changed, too. Our B cells and T cells, ...

SAN FRANCISCO (KGO) -- There are multiple COVID-19 variants circulating the Bay Area, making it harder for this pandemic to be under control. ABC7 News reporter Luz Pena got an exclusive look at a ...

A Statistical Immune Correlates of Protection Model for Predicting Efficacy from Neutralizing Antibody Titers to Establish Immunobridging of ...

"As these viruses continue to evolve, public health officials watch carefully to see whether new strains will be more easily spread or cause more severe disease, and they are continuously testing to ...

Mark Cameron was part of the rapid-response research team when the SARS (Severe Acute Respiratory Syndrome) outbreak hit Toronto in the early 2000s. Now a faculty member in Population and Quantitative ...

(NewsNation) — While COVID-19 isn’t the deadly and dangerous virus it was five years ago, it has still found a way to poke its ugly head into the health world. The latest problem to arise: the variant ...

Households will be able to obtain four free antigen COVID-19 tests by visiting COVIDtests.gov, and filling out their name and shipping address, a repeat of the 2023 program. And the department says ...