CDC

The count of pediatric cases under investigation has grown since the agency's last update, but most of the increase represents previous cases that are just now being reported.

New numbers from the Centers for Disease Control and Prevention show that synthetic opioid use is driving the overdose crisis in the U.S.

With the back and forth on boosters from government agencies, many Americans are wondering if they really need an extra shot. Here is what the science says about who needs a booster now — and why.

The advisory committee's recommendation follows the FDA's authorization of Pfizer vaccine boosters for people 65 and up. Both regulatory moves will inform the U.S. plan to dispense extra doses.

The updated guidance promotes vaccination for those old enough and says vaccinated children may not need masks. What about kids too young for vaccines? And as summer begins, what about vacation risks?

The CDC released new estimates showing the highly contagious delta variant now accounts for more than 51% of cases in the U.S. In some parts of the country, the strain is responsible for 80% of cases.

For the second time in three years, life expectancy in the U.S. has ticked downward. In three reports issued Thursday, the Centers for Disease Control and…

Travis County health officials have confirmed the second case of Zika virus in the region. With peak mosquito season approaching, what should people be…