At least 5.2 million kindergarten-age kids live in counties where measles vaccination rates have fallen below the herd immunity threshold, according to a Post investigation.

President Donald Trump was humiliated after a conversation about vaccines on CBS saw Dr Mehmet Oz deny his previous statement ...

Health officials are now warning that Missouri is below the 95% vaccination rate needed for herd immunity against measles.

Pittsburgh has reported its first measles case of the year after an infected individual visited a local children's hospital.