Delaware health officials are alerting the public about a potential measles exposure after an out-of-state individual with the disease traveled through the greater Rehoboth area. The Delaware Division of Public Health (DPH) said the individual visited an unknown number of stores and restaurants i n the area on Sept. 4, 2026. Because health officials cannot fully determine all of the locations the person visited, DPH issued a community-wide notification instead of “narrowing guidance to specific sites.” Health officials said the individual had not yet developed symptoms but was believed to have been contagious at the time of the visits. DPH was then notified after the period when post exposure treatment would have been effective. Delaware Jul 22 Delaware declares measles outbreak after 4 confirmed cases Health Wellness Jul 21 Delaware officials urge vaccination after first measles case in decade Health Jul 24 U.S. measles cases soar to 35-year high in 2026, already surpassing all of 2025 “The exposure is an important reminder of the importance of vaccination for those who are eligible. Vaccination remains the best protection against measles. Two doses of the measles, mumps and rubella (MMR) vaccine are 97% effective at preventing measles,” health officials wrote in a statement.” People who were in the affected area on Sept. 4 should watch for early symptoms of measles, including fever, cough, runny nose and pink eye, according to health officials. Those symptoms can last two to four days before a rash appears. The rash typically appears three to five days after symptoms begin, usually starting on the face and spreading down the body. Anyone who develops symptoms and may have been exposed should immediately isolate themselves and contact their health care provider. ...read more read less