Pennsylvania's 4th measles-related death sparks vaccination concerns

Pennsylvania reported a fourth measles-related death, the most in the U.S. in decades. None of the people who died were vaccinated, officials said. Dr. Jonathan LaPook joins with more.

Pennsylvania reported a fourth measles-related death, the most in the U.S. in decades. None of the people who died were vaccinated, officials said. Dr. Jonathan LaPook joins with more.