Measles cases in the U.S. have risen to the worst in 33 years, according to reports from the Centers for Disease Control and Prevention. The ...

Infections of COVID-19 are growing or likely growing in half of the U.S. as of July 8, according to CDC estimates.

Infections of COVID-19 are growing or likely growing in half of the U.S. as of July 8, according to CDC estimates.

COVID-19 is rising again in California, driven by new variants like “Nimbus,” amid a nationwide summer wave. Despite “low” ...

Virus levels have increased sharply since June, with nearly all wastewater sites showing signs of transmission.

C ALIFORNIA — Emergency rooms across the country are seeing a spike in visits for treatment of tick bites and tick-borne illnesses, especially in the Northeast and Midwest, according to new data from ...

Los Angeles, Orange, Riverside and San Bernardino counties have reported eight cases so far this year compared to 10 total in ...