CACHE COUNTY, Utah ( ABC4) — Mosquitoes infected with West Nile Virus have been found in Cache County.

A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to know about symptoms and vaccines.

At a time when US is reporting a surge in measles cases despite the disease being eliminated two decades back, the country is ...

Yahoo News answers some of the most frequently asked questions about measles amid the multi-state outbreaks that started in ...

See how many tick bite-related emergency department visits the Northeast has seen this summer compared to last summer.