How far would you go to protect your child? Every mother faces impossible choices. Vaccination is one of the hardest. For single mom Kate O'Hara, there was no decision to make. Her daughter, Rosie, is one of a small percentage of children who can't be vaccinated against measles. All Kate can do is hope that her little girl is safe. For mommy blogger Madeleine Cooper, vaccination was a leap of faith she wasn't prepared to take. She and her husband declined controversial measles shots for their daughter Clara. All she can do is pray that it's the right decision. But when classmates Clara and Rosie both become sick will Kate pay for Madeleine's choice?