A mutated strain of influenza A, H3N2 subclade K, is surging worldwide, sparking concern about a severe flu season in the U.S. Here's what to symptoms to look out for.

Add Yahoo as a preferred source to see more of our stories on Google. Flu season is here in New Jersey, but other illnesses are in full swing as well. Cases of influenza increased during holiday ...

Flu activity remains elevated across Tennessee, with parts of East Tennessee reporting some of the highest levels of ...

The Chikungunya virus is spread by infected mosquitoes and causes symptoms like fever and severe joint pain. There is no specific medicine to treat the virus, and the best way to prevent it is by ...

The virus, sometimes called the stomach bug, has sickened some Olympic athletes in Milan. By Simar Bajaj Every year, there’s a surge in norovirus cases between November and April, and this holiday ...

The Epstein-Barr virus can cause neurological symptoms in some people. These symptoms may arise due to an infection of the nervous system or post-infection inflammation. Epstein-Barr virus (EBV) ...

A 25-year-old nurse in West Bengal has died from Nipah virus infection, marking the state’s first recorded fatality. The highly fatal virus spreads from bats or through close human contact and can ...

Illinois is seeing levels of respiratory viruses tick up, the Illinois Department of Public Health said, with a "notable increase" in emergency department visits and hospital admissions for flu, ...

Symptoms of Zika virus are typically mild and may include fever, rash, and joint pain. For most people, symptoms are not harmful, but the virus can lead to serious complications if you’re pregnant.