As measles spreads across the U.S., a few fully vaccinated people have contracted rare breakthrough cases. Here's what to know and why vaccination is still important.

“Viruses don’t need a passport,” said Dr. William Schaffner ... and had a “relatively mild infection.” Although breakthrough cases can happen in those who are vaccinated, they are ...

Such cases, called breakthrough infections, aren’t unexpected. That’s because the vaccines are not 100 percent effective. “When people hear about breakthrough infections, they automatically ...

The health secretary has chipped away at the idea that immunizing children against measles and other diseases is a public ...

At least one case has been reported in ... are considered up-to-date on their COVID-19 vaccines. The Minnesota Department of Health began reporting breakthrough infections in fully vaccinated ...

The U.S. declared measles eliminated in 2000 when vaccination rates were high, but cases are now ... Two doses of MMR vaccines are 97% effective, but breakthrough infections — which are uncommon ...

Moss said that while the measles virus travels more quickly among unvaccinated populations, breakthrough cases among vaccinated ... is an indication of increased vaccine hesitancy.

A measles outbreak spanning Texas, New Mexico and Oklahoma reached at least 453 cases Friday and might be linked to cases in ...