New data from the Centers for Disease Control and Prevention suggests that deaths from Alzheimer's disease have increased by more than 50 percent in the past 15 years in the USA.
The World Health Organization estimates three to four million people in the Americas will be infected with Zika virus in 2017. The Centers for Disease Control and Prevention is working to prevent the spread.
The technician's potential exposure is at least the second to prompt a precautionary response from the agency in six months.
The Ebola epidemic in West Africa is "spiraling out of control" and posing a threat to global security, says Obama.
The CDC is a US federal government health agency based in Atlanta.