Vaccines save millions of lives every year, but recent outbreaks demonstrate the tenuous nature of this achievement. The Sabin Vaccine Institute (Sabin) is launching a research program to better understand the factors leading some to accept vaccination and others to delay or refuse it.

Happy Father's Day, Dads! On this special day where fatherhood is cherished, we asked several dads why they got their kids vaccinated. Here is what they had to say.