The Maine Center for Disease Control and Prevention announced Tuesday that four additional cases of measles have been identified, bringing the total in the state to five.

Earlier this month, the agency announced that an adult in Penobscot County had been diagnosed as the first measles case in Maine since 2019.

The four people with new lab-confirmed measles cases are also from Penobscot County, are all unvaccinated and were exposed to the first person who tested positive, according to a news release Tuesday.

There are no new exposure locations associated with the diagnoses, and there is no risk to the public, according to a Maine CDC spokesperson.

The agency is launching a public measles dashboard to track case and outbreak numbers, as well as the counties where cases have been identified.

Many parts of the country have experienced outbreaks of measles, a highly contagious disease that used to be common before the measles vaccine became widely available in the 1960s. It was considered eliminated in the U.S. in 2000 by the World Health Organization. The U.S. Centers for Disease Control and Prevention has reported 910 cases nationwide so far in 2026 and 2,276 cases in 2025.

According to the U.S. CDC, complications could include encephalitis and pneumonia. Three people died from measles in 2025, according to the U.S. CDC. In addition to a rash, measles symptoms include fever, cough, runny nose and red, watery eyes.

Measles is spread through coughs or sneezes and, once infected, a person is contagious from four days before their rash starts through four days afterward. The virus remains alive for up to two hours on surfaces and in the air. The period from exposure to onset of symptoms is typically 10 to 14 days but can be longer, according to the Maine CDC.

People who develop measles symptoms should contact their health provider for instructions before going to their office or hospital to help prevent further spread, according to health officials.