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

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.

Summer heat, outdoor fun ... and cold and flu symptoms? The three may not go together in many people's minds: partly owing to ...

There were no key votes in the House this week. REGULATING NUCLEAR POWER: The Senate has confirmed the nomination of David Wright to be a commissioner on the Nuclear Regulatory Commission (NRC) for a ...

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