Falling vacination rates endanger children with compromised immune systems

WINDHAM, ME - MAY 23: Zoé Paul, 6, looks at neighborhhod children playing outside her bedroom window. For Zoé, who was born with a rare birth defect that required a liver transplant at age 2 and has a weakened immune system, vaccines are a life-or-death matter. Maine's vaccination rates for students entering kindergarten worsened yet again, making the return of preventable diseases like measles, pertussis, chicken pox more likely, and puts children like Zoé at risk. (Staff photo by Ben McCanna/Portland Portland Press Herald via Getty Images)