It’s been growing for months, now the worst measles outbreak the US has seen in decades has spread to more than 800 people in two dozen states.

Here in the Bay Area, residents got a fresh scare about a week ago with reports of possible measles exposures at a popular Berkeley supermarket. Meanwhile, state lawmakers are moving forward with new legislation to tighten up vaccination requirements for school age children.

On this edition of In Depth we welcome on two health experts to get their perspective on why a disease once eliminated in the US is now making a comeback and what can be done to stop it.

Host: KCBS Radio reporter Keith Menconi

Guests:

• Dr. George Han, deputy health officer with the County of Santa Clara’s Public Health Department
• Dr. Yvonne Maldonado, professor of pediatrics and health research  and chief of infectious diseases at the Stanford University School of Medicine