DOVER, DEL. (July 22, 2026) – The Delaware Division of Public Health (DPH) is reporting two additional positive measles cases, totaling four in the state. The Centers for Disease Control and Prevention (CDC) defines a measles outbreak as three or more cases of measles that are connected by time and location. Extensive contact tracing is ongoing to identify anyone exposed to the individuals who tested positive. DPH will notify people who were identified as exposed to confirm whether they have been vaccinated against measles, provide educational resources, and to recommend treatment when necessary. More information will be forthcoming if contact tracing reveals any known public exposures.
The measles cases identified to date are unvaccinated adult males in Kent County. DPH is unable to provide more details about the individuals who tested positive at this time due to medical privacy restrictions.
People who are unvaccinated, pregnant, immunocompromised, or too young to be vaccinated face the highest risk of severe complications during a measles outbreak. Pregnant persons, immunocompromised persons, or children less than 6 months old who have come into contact with someone suspected to have measles, should immediately contact their primary care provider or Delawares Office of Infectious Disease Epidemiology at 302-744-4990 for guidance.
Unvaccinated individuals or those unsure of their vaccination status who get exposed to a person with measles should contact their primary care provider or a public health clinic to obtain an MMR vaccine.
Delawareans are encouraged to confirm their vaccination status as well as the status of their children. If they are unsure of their vaccination status, they can visit the DelVAX Public Portal and view their personal profile. Individuals may also contact their primary health care provider for additional details if they are unable to obtain their records on DelVAX.
Generally, anyone showing any symptoms of measles should seek immediate health care by contacting their primary care provider. If symptoms are severe, they should seek immediate care at the nearest emergency department. Prior to going to any health care facility, the individual should notify providers and medical transport that they or their child were exposed to measles. If you do not have a provider, contact a public health clinic.
Did You Know?
- The Immunization Coalition of Delaware (a program of the Academy) has resources on measles, the current outbreak, and other vaccine preventable diseases (Click Here)
- Check out the ICD’s latest Week in Review for a weekly digest of immunization news in Delaware and around the world.

