Indiana Measles Resources and Information
The Indiana Department of Health investigated an outbreak of measles and working with local health officials to help stop the spread of infection. The reported cases this year in Allen County were connected to each other with no known links to outbreaks in other states.
2025 Measles Cases
County | Cases |
| Allen | 8 |
| Lake | 2 |
| Putnam | 1 |
Data are provisional and subject to change.
Measles is caused by a highly contagious virus that spreads easily from person to person. It is an airborne disease, meaning it spreads through the air when an infected person breathes, coughs, sneezes, or talks. The virus can stay alive in the air and on surfaces for up to two hours. If one person has it, up to 9 out of 10 people nearby will become infected if they are not protected. Two doses of MMR (measles, mumps, rubella) vaccine are highly effective at preventing measles.
- Indiana Immunization Data Dashboards
- Indiana School Vaccine Requirements
- Information on measles vaccination from the Centers for Disease Control and Prevention
Information
Resources for Healthcare Providers
Laboratory Testing
Other Resources
- Centers for Disease Control and Prevention (CDC) Measles Information
- CDC Measles Vaccination Information
- Immunization Schedules
- Indiana School Entry Immunization Requirements
Page last updated: Aug. 25, 2025
