But outbreaks of vaccine-preventable diseases still happen all over the world.
These diseases still kill children.
There are outbreaks still going on all over the world that could have been prevented with vaccines.
This year in California, three babies have already died of whooping cough.
These are not isolated incidents.
There are many reasons why parents choose not to vaccinate. But that decision is often based on misinformation.
Here are some common myths and why they aren't true.