Mosquitoes are buzzing again — and some are carrying West Nile virus. Local health agencies have already found virus-positive mosquitoes in Sacramento, Kern, Tulare, and Santa Clara counties ...

More mosquitoes have tested positive for West Nile Virus in the north suburbs, this time in Niles, Illinois health officials said.

A case of travel-related Zika virus has been detected on the Hawaiian island of Oahu, prompting the Hawaii Department of Heath to release guidance for travelers.

One travel-related case of Zika virus has been confirmed in Oahu, with two other individuals potentially exposed.

Zika Virus Is Back After 6 Years in One of the Most Popular U.S. Tourist Destinations The island of Oahu has at least one confirmed case of the mosquito-borne virus, which can also be transmitted ...

Kevin Boyce, a 62-year-old from Massachusetts, died after suffering brain damage from Powassan virus, a dangerous tick-borne disease. His family is now sharing his story to encourage others to be ...

A team identified herpes virus saimiri, which infects the T cells of squirrel monkeys, as a source of proteins that activate pathways in T cells that are needed to promote T cell survival.

Many people are infected with the Epstein-Barr virus (EBV), and most are unaware of it. However, EBV can sometimes cause cancer, and this pathogen also appears to play an important role in ...

Experts urge US to prepare for possible new pandemic as new H5N1 bird flu outbreak spreads to dairy animals, human infections. Here's what to know ...

West Nile virus is more common than you may think. Learn how to protect yourself and others.

Mono County, in the Mammoth Lakes area, reported three deaths related to hantavirus. Here's what Los Angeles County residents should know about the virus.