Almost everyone in the United States gets vaccinated against measles, and nearly every measles outbreak starts with an imported case, says a CDC expert.
Health officials in California issued an alert saying a LinkedIn employee who had measles commuted to and from San Francisco last week on the BART, potentially exposing thousands of people to the virus.
The White House said it opposes a federal vaccine mandate Tuesday, after a recent outbreak of measles in the US led to a scrutiny of families who are...