Measles Infection Confirmed in Fully Vaccinated Individual, Public Health Warning Issued for Recent Visitors to Hawaii

HONOLULU — Officials from the Hawaii Department of Health (DOH) announced on March 7, 2026, the first measles case reported in the state this year. The individual became ill after arrival and is currently recovering at a private residence on Oahu.

Health authorities are conducting an investigation to identify potential exposures and prevent further spread.

The DOH released an exposure alert, notifying individuals who visited the following sites during specific periods may have been exposed:

• Oahu: Daniel K. Inouye International Airport (February 26–March 4), Lāʻie Mormon Temple (February 27), and Hilo Siam Thai Restaurant (March 3).

• Hawaii Island: Hilo International Airport (March 3–4) and Hawaii Volcanoes National Park (March 3).

Those present at these locations during the listed times are advised to contact their healthcare providers immediately if they have not received a measles-containing vaccine or are immunocompromised.

The DOH is also directly contacting individuals who had close contact with the confirmed case.

Measles: A Highly Contagious Threat

This case occurs amid a broader trend of measles resurgence in the United States. According to the Centers for Disease Control and Prevention (CDC), 285 measles cases were reported in the U.S. as of December 31, 2024,

with 69% linked to outbreaks.

While Hawaii has historically maintained high vaccination rates, recent data indicate declining MMR coverage among kindergarteners, raising concerns about community immunity.

Measles, caused by the measles virus, is one of the most contagious infectious diseases known. It spreads through respiratory droplets and can remain airborne for up to two hours in enclosed spaces.

Symptoms typically appear 10–12 days after exposure and include fever, cough, runny nose, red eyes, and a characteristic rash.

Complications such as pneumonia, encephalitis, and blindness are possible, particularly in young children or immunocompromised individuals.

Vaccination and Public Health Recommendations

The CDC notes that measles was declared eliminated in the U.S. in 2000, but global outbreaks and travel-related importations have led to sporadic cases.

The DOH emphasized that the visitor’s vaccination status does not eliminate the risk of transmission, as breakthrough infections can occur in fully vaccinated individuals.

Dr. Sarah Kemble, the state epidemiologist, stated, ‘The best way to protect yourself and your loved ones against measles is to stay up to date on your measles shots.’

She also highlighted the importance of isolating individuals with symptoms to prevent further spread.

Measles, Mumps, and Rubella (MMR) Vaccine

The measles, mumps, and rubella (MMR) vaccine is highly effective, with two doses providing long-term protection.

The DOH reiterated that unvaccinated individuals who believe they may have been exposed should contact their providers immediately.

For those without immunity, the MMR vaccine can prevent or reduce the severity of the disease if administered within 72 hours of exposure.

The DOH confirmed the case through laboratory testing and is continuing to trace contacts. Officials noted that while the visitor was vaccinated, the outbreak underscores the importance of maintaining high vaccination rates to prevent future cases.

The investigation is ongoing, with further updates expected in the coming weeks.