Bay Area health officials urge vigilance as measles cases rise in the US 

ALAMEDA COUNTY – With measles on the rise nationally, and recent cases locally, Alameda County joins Bay Area health officials in urging everyone to be up to date on measles vaccinations and to watch for symptoms after travel or exposure. The best protection against measles is two doses of the measles-mumps-rubella (MMR) vaccine, which protects you for life. This is particularly important for anyone travelling internationally in the upcoming months.

The Centers for Disease Control and Prevention (CDC) reports that in 2024 there have been 64 confirmed cases of measles across 17 jurisdictions, with more than 90 percent of those cases linked to international travel. Measles is circulating in many regions in the world, including popular tourist and business destinations. Most cases in the United States have been among children aged 12 months and older who had not received the MMR vaccine.

With three major airports, the Bay Area is a hub for international travel, increasing the potential for exposure to this highly contagious virus. For individuals or families that plan to travel internationally, anyone who is not vaccinated against measles is at increased risk of getting infected. Plan early before international travel and check your destination and the CDC’s Global Measles Travel Health ( for more travel health advice, including where measles outbreaks have been reported. The CDC offers accelerated vaccination guidelines for persons, including children under 12 months, who plan to travel internationally. Parents should consult with their child’s health care provider prior to travel.

After returning to the United States, watch for signs and symptoms of measles for 3 weeks. While MMR vaccination rates have been high in the Bay Area, it’s important to confirm vaccination history. Having documentation of your vaccination status can help you avoid being quarantined if you are exposed.

Measles symptoms include fever, cough, runny nose, and conjunctivitis (pink eye), followed 2-4 days later by a rash. The virus is transmitted by infectious droplets through direct contact or through the air when an infected person breathes, coughs, or sneezes. Infectious droplets can linger in indoor air for several hours.

About one in five persons infected with measles requires hospitalization, and nearly 1 to 3 of every 1,000 children who become infected with measles will die from respiratory and neurologic complications, according to the CDC. Measles presents the greatest risk to children under 5 years of age, adults over 20 years of age, pregnant women, and people with compromised immune systems.

Vaccination is highly effective at preventing measles. The MMR vaccine is recommended for children aged 12-15 months, with a second dose administered between ages 4 and 6. Infants 6-12 months of age can start vaccination early prior to international travel. Teenagers and adults with no evidence of immunity should be vaccinated right away.

“Although risk of exposure to measles in the Bay Area is low, simple prevention steps like getting vaccinated or finding vaccination records can still have a big impact. It is especially important for Alameda County residents to stay up to date with their measles vaccinations if travelling internationally in the coming months,” said Alameda County Health Officer Dr. Nicholas Moss.

For questions about the MMR vaccine and immunization records, check with your health care provider and access your digital vaccine record.

Health Officers from the counties of Alameda, Contra Costa, Marin, Monterey, Napa, Santa Clara, Santa Cruz, San Benito, San Francisco, San Mateo, Solano, Sonoma, and the city of Berkeley encourage the public to take these easy steps to protect themselves and others.

(ACPHD Release)

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