Vaccines

Chart: Ebola cases and confirmed deaths in Africa

Data: DRC Ministry of Health; Chart: Andrew Witherspoon, Harry Stevens/Axios

The world's second-largest Ebola outbreak on record is underway in the Democratic Republic of the Congo, and entered an ominous phase this week with the spread of the virus into Uganda.

What to watch: The World Health Organization and aid groups are pouring resources into the region to try to contain it, but the longer this Ebola outbreak continues, the greater the likelihood it will spread to other highly populated areas within the country, move to other neighboring countries or even internationally.

The intensifying national debate over vaccine exemption rules

Data: Immunization Action Coalition; Map: Aïda Amer/Axios

As measles spreads and public officials try to prevent the disease from becoming endemic in the U.S. again, a debate is heating up nationally over whether to mandate vaccines or keep in place laws that allow for more individual choice.

The latest: Anthony Fauci, head of the National Institute of Allergy and Infectious Diseases, tells Axios instead of mandating vaccines, it's time for states to tighten their exemptions — "the flexibility has gone too far."