COVID-19 activity is rising in much of the country. Data released Friday by federal health officials shows overall ...

RFK Jr. is considering dismantling the U.S. Preventive Services Task Force. This would be a disaster for public health.

Pop star Justin Timberlake said he got a brutal case of Lyme disease. What to know about ticks and Lyme disease symptoms and treatment in Arizona.

Amid a shortage in the world heroin supply, a vastly more dangerous killer drug is surging, and so is the number of deaths.