Indiana health officials confirmed six new measles cases in Allen County on Wednesday, marking the latest state to declare an outbreak amid a growing national health crisis [1]. The cases, involving four unvaccinated minors and two adults with unknown vaccination status, have no known connection to other ongoing outbreaks.

The U.S. is experiencing a significant surge in measles cases, with Texas reporting 505 cases across 21 counties - more than double the total cases recorded in 2024 [1,2]. The outbreak has claimed three lives: two unvaccinated children in Texas and one unvaccinated adult in New Mexico [1].

Active outbreaks, defined as three or more related cases by the CDC, are currently present in six states [1]:

Texas: 505 cases, 57 hospitalizationsNew Mexico: 56 casesKansas: 32 cases across eight countiesOhio: 11 casesOklahoma: 8 confirmed and 2 probable casesIndiana: 6 cases

The virus has particularly impacted Gaines County, Texas, where 328 cases have been reported in an undervaccinated Mennonite community, affecting over 1% of the county's population [1]. The World Health Organization has linked cases in Mexico to the Texas outbreak.

Health officials note that measles is highly contagious but preventable through vaccination. The virus has been considered eliminated from the U.S. since 2000 [1]. In response to the outbreak, some regions are seeing increased vaccination rates, with New Mexico reporting 16,455 residents receiving vaccines between February 1 and April 3, 2025 [3].