Measles is spreading in the U.S.; what you should know

The United States is experiencing its second-highest number of measles cases in nearly two decades. The Centers for Disease Control and Prevention said the diagnosed cases have climbed to 465. At least 19 states have reported cases of the highly contagious virus. The outbreaks are linked to people who traveled from countries such as Israel, Ukraine and the Philippines, where large measles outbreaks are occurring.

The disease is spreading in U.S. communities that have relatively high numbers of people who have not been vaccinated against measles.

Here are some answers to commonly asked questions about measles, which can cause serious complications among all age groups, especially young children.

How does measles spread?

Can antibiotics treat measles?