Measles is prevalent this season, with instances in the Bay Area, Washington state, New York, and other places.

Measles can spread quickly in communities where people are not vaccinated. Children and anyone else who is not protected against measles is at risk of getting infected.

The Centers for Disease control has posted information for parents about how to protect their children from measles.

This video from STAT, a health and science journalism site, explains how measles spreads and why it is so dangerous.

It is so important to be up to date on vaccinations, including before traveling abroad.