At the same time, millions of younger children will soon go back to school. For some, there's a new vaccine they'll need before the start of the new school year.
So, parents - what do you need to know to protect your child? And why are we seeing a resurgence of illnesses like mumps, even among people who have been vaccinated?
Our guest on Newsviews this week is Nirav D. Shah, director of the Illinois Department of Public Health.