Measles circumstances have doubled in California thus far this 12 months in comparison with final 12 months — and 2026 is barely half over.
California has confirmed 52 measles circumstances within the first 6½ months of the 12 months; that’s greater than double the 25 circumstances reported in all of 2025. If this tempo continues, the variety of circumstances will go California’s excessive from 2015, when there have been 125 circumstances within the state and a portion of them have been associated to a big outbreak at Disneyland.
Of this 12 months’s 52 circumstances, 49 sufferers have been both unvaccinated or had an unknown vaccination report. 4 have needed to be hospitalized. Many circumstances contain youngsters or younger adults — 27 circumstances concerned these ages 5 to 19, and 15 circumstances concerned youngsters beneath 5 years outdated, in keeping with the California Division of Public Well being. L.A. County has tallied seven circumstances thus far this 12 months amongst its residents.
Nationally, measles circumstances have almost eclipsed final 12 months’s whole already and the nation is poised to hit its highest case degree because the late Nineteen Eighties and early ’90s. As of mid-July, 2,260 measles circumstances have been reported, in comparison with 2,289 in all of final 12 months. Final 12 months’s tally was the very best in a single 12 months because the devastating 1989-91 measles epidemic, which resulted in additional than 55,000 circumstances and 166 suspected deaths.
The U.S. Facilities for Illness Management and Prevention mentioned 93% of confirmed measles circumstances are related to outbreaks. There have been 34 new outbreaks reported thus far this 12 months.
New measles circumstances proceed to be reported throughout California at a daily clip, placing unvaccinated individuals — together with infants too younger to have obtained their first immunization — susceptible to extreme sickness and probably demise.
The newest case concerned a juvenile who had been dwelling overseas and now lives in Orange County; the kid was contagious with measles whereas passing via Los Angeles Worldwide Airport, officers mentioned.
The juvenile arrived on a flight from Cancún, Mexico, on Delta Air Traces Flight 614 on July 16 at 9:45 p.m., the Los Angeles County Division of Public Well being mentioned. Mexico is among the many high 10 nations worldwide with measles outbreaks, in keeping with the World Well being Group.
Individuals who may need been uncovered to the infectious passenger included those that have been within the worldwide terminal, round Gate 206, about an hour after the flight’s arrival, and across the flight’s baggage declare space between 10:30 p.m. and 11:30 p.m.
Passengers who sat close to the contaminated passenger, in addition to individuals uncovered to the particular person in a healthcare setting, can be contacted about their exposures, officers with the Los Angeles County and Orange County public well being departments mentioned. Individuals are susceptible to growing measles from seven to 21 days after their publicity; the final day to observe for signs is Aug. 6.
Individuals who aren’t immunized are at the next danger to contract measles and may monitor their signs, officers mentioned. Those that have been immunized, or have been beforehand contaminated, are most likely protected in opposition to an infection “however ought to nonetheless monitor for signs,” the L.A. County Division of Public Well being mentioned.
“As measles circumstances improve, it can be crucial that residents take steps to verify they’re totally protected. The MMR vaccine is the most secure and most dependable technique to stop measles and shield your self, your loved ones, and your group,” mentioned Dr. Muntu Davis, the L.A. County well being officer, in an announcement. “Measles spreads simply and may result in severe problems, together with pneumonia, mind swelling, and even demise.”
One other infectious traveler handed via LAX whereas contaminated with measles earlier this month. The traveler arrived on British Airways flight 281, from London, at Gate 155 within the worldwide terminal July 3. Individuals at that gate between 3 p.m. and 4 p.m. could have been uncovered to measles, in addition to individuals at aboard the Hertz automotive rental shuttle between 3:30 p.m. and 4:30 p.m.
There have been at the very least two infants who’ve contracted measles thus far this 12 months in California — each of whom traveled internationally earlier than falling ailing. One case was reported in San Francisco, and the opposite in Orange County. The infants have been most likely uncovered to measles “throughout worldwide journey, whether or not in airports, airplanes or in any other case whereas overseas,” the state Division of Public Well being instructed The Instances. “Some however not all of them visited an space with a recognized measles outbreak.”
Since 2020, the state Division of Public Well being has obtained 11 stories of infants beneath 1 12 months of age with measles. Amongst these, eight had traveled internationally and one traveled to a different state the place there was a measles outbreak.
“Infants lower than 1 12 months outdated can contract measles, particularly throughout journey,” the L.A. County Division of Public Well being mentioned.
The opposite two circumstances concerned infants who had not traveled earlier than getting the virus.
Los Angeles County well being officers advise that infants age 6 to 11 months who can be touring internationally, or domestically to areas with measles outbreaks, get the measles vaccine early, which is routinely given after a baby turns 1, after which once more between the ages of 4 and 6. Infants who get that early dose ought to nonetheless get two extra doses, officers mentioned.
California well being officers additionally advocate that these age 1 to three get their second measles vaccine dose early in the event that they’re going to journey internationally.
“Dad and mom can take into account a number of components when deciding about journey, together with whether or not measles is circulating at their vacation spot, the potential for publicity throughout journey, and whether or not their baby is eligible for an early MMR dose,” the California Division of Public Well being instructed The Instances. “Speaking with the kid’s pediatrician may also help households weigh these issues and select what makes essentially the most sense for his or her state of affairs.”
If mother and father do determine to provide their infants a vaccine to guard in opposition to measles, they need to attempt to get the injection at the very least two weeks earlier than journey.
When the measles vaccine is given at 6 months of age, 76% developed protecting antibodies in opposition to measles, and when given at 8 to 9 months, 85% developed antibodies, in keeping with UC San Francisco infectious illnesses knowledgeable Dr. Peter Chin-Hong. “That is in distinction to infants 12 months and older, the place greater than 95% develop protecting antibodies.”
“Measles doesn’t solely have an effect on individuals who journey or stay internationally—everyone seems to be in danger in the event that they’re not protected,” mentioned Dr. Anissa Davis, a deputy county well being officer in Orange County. “As a result of measles is extremely contagious, it could possibly unfold shortly inside communities, even amongst those that haven’t traveled. The easiest way to guard your self and your family members is to get vaccinated earlier than publicity happens.”
Well being officers are encouraging mother and father to plan now for updating their youngsters’ vaccines, with the brand new faculty 12 months just a few weeks away.
“The rise in measles circumstances nationally is a reminder that we can’t let our guard down in opposition to severe and extremely contagious illnesses,” mentioned Dr. Susan Philip, the San Francisco well being officer, in an announcement.
