Indiana is concerned because measles, which was once thought to be eradicated in the United States, has resurfaced this summer.
As of June 5, 2025, the Centers for Disease Control and Prevention (CDC) reported 1,168 confirmed cases in 34 states, including three deaths, making it the largest outbreak in decades. With Indiana reporting eight cases, all in Allen County, health officials are urging residents to take immediate action.
According to a state press release, Indiana’s first measles case in 2025 was confirmed on April 7, involving an unvaccinated minor from Allen County. Two days later, five more cases — three minors and two adults — were reported, all linked to the same patient. The Allen County Health Department emphasized that “exposures to the confirmed case are minimal” and that the “risk to the general public remains low” in a WFYI report, but warned that measles is extremely contagious.
Dr. Thomas Duszynski, an epidemiology expert at Indiana University’s Fairbanks School of Public Health, put the threat bluntly: “Measles is one of the most infectious organisms on the planet.” A single person with measles infects an average of 12-18 people.
He emphasized that hospitalization rates are increasing, particularly among young children, and urged vaccination to achieve herd immunity.
The CDC’s national data emphasizes the severity. This year, 89% of cases are outbreak-related. Texas, New Mexico, and Kansas have reported devastating numbers, with 744 cases in Texas and two child fatalities. New Mexico has 81 cases and one death. The CDC warns that measles can spread in airports and on planes, and advises passengers to double-check their MMR vaccinations.
Measles is a severe illness. The virus spreads through coughs and sneezes and can remain in the air or on surfaces for up to two hours. Symptoms include fever, cough, and red eyes, followed by a rash. In vulnerable groups, complications may include pneumonia, ear infections, encephalitis, and even death.
Vaccination remains the most effective defense. A single MMR dose confers approximately 93% immunity, while two doses provide 97% protection. However, vaccination rates have declined in many communities, falling below the 95% threshold required for herd immunity. The CDC updated its guidance on June 11, urging all international travelers to ensure they have received the MMR vaccine, regardless of their destination.
For Hoosiers, the message is clear: even a small cluster can spark larger outbreaks. Indiana health officials advise everyone, particularly parents and travelers, to confirm MMR vaccination, monitor for measles symptoms, stay at home, and contact a doctor if illness develops.
