Why Some Rich, Educated Parents Avoid Vaccines

vaccines
Celebrities Jim Carrey and Jenny McCarthy are outspoken critics of childhood vaccines, despite overwhelming medical evidence of their benefits.

Health officials in the San Francisco Bay Area are warning local residents that thousands of them may have been exposed to measles, a potentially deadly disease that was once eliminated in the United States but has rebounded in recent years.

The latest measles threat started when an infected student at the University of California, Berkeley, rode the Bay Area Rapid Transit (BART) train system earlier this month, possibly exposing hundreds of thousands of people to the disease, the Los Angeles Times reports.

Latest Videos From
TOPICS
Marc Lallanilla
Live Science Contributor
Marc Lallanilla has been a science writer and health editor at About.com and a producer with ABCNews.com. His freelance writing has appeared in the Los Angeles Times and TheWeek.com. Marc has a Master's degree in environmental planning from the University of California, Berkeley, and an undergraduate degree from the University of Texas at Austin.