RSV is usually contagious for three to eight days. A patient also may be contagious a day or two before experiencing symptoms ...

COVID-19 has been more prevalent and has caused more deaths than flu or respiratory syncytial virus (RSV) in the last three years, according to a study on American veterans published Monday in JAMA ...

The U.S. is seeing a "quad-demic" as cases of COVID-19, flu, RSV and norovirus spread at the same time. Experts said this is ...

As influenza and cold cases, including respiratory syncytial virus (RSV) spike in the nation and Nevada, Intermountain Health ...

Flu season is here in California, but other illnesses are in full swing in the Golden State. Here are the symptoms and how ...

Nearly 80% of infants born in a California health system were exposed to nirsevimab or the maternal respiratory syncytial ...

This cohort study showed that, during the 2022 to 2023 season, infection with SARS-CoV-2 was associated with more severe disease outcomes than influenza or respiratory syncytial virus (RSV), whereas ...

The study, published Jan. 20 in The Lancet Infectious Diseases, found the vaccine to be 78% effective against RSV infection, 79% effective against emergency department and urgent care visits and 80% ...

Illness such as COVID, flu and RSV have, once again, been thriving this winter. According to local health experts, cases of ...

Here's what you need to know. A rise in rates of sudden unexpected infant deaths may have been linked to an off-season surge of RSV in 2021, according to a new study. ABC News chief medical ...