New measles case confirmed in central Iowa; potential exposure locations in Ankeny, Des Moines

A child in Polk County has tested positive for measles, and public health officials are urging anyone who visited specific Ankeny and Des Moines locations between November 5 and 8 to monitor for symptoms. The Polk County Health Department and Iowa Department of Health and Human Services confirmed the case Wednesday, listing a Walmart and Hy-Vee in Ankeny, an urgent care clinic, and multiple areas inside UnityPoint Health—Iowa Methodist Medical Center and Blank Children’s Hospital in Des Moines as potential exposure sites. The child was likely infected during travel outside Iowa, not from community spread within the state, though Iowa has already recorded 50 confirmed measles cases in 2026 with evidence of person-to-person transmission. Neighboring Wisconsin is experiencing a large outbreak involving hundreds of cases in its southwestern region, and Iowa officials anticipate more cases, particularly among unvaccinated individuals.

Measles is one of the most contagious viruses known; it can linger in the air for up to two hours after an infected person leaves a room. Symptoms typically appear seven to 14 days after exposure but can take up to 21 days, starting with fever, cough, runny nose, and red eyes before a rash spreads from the face downward. Anyone who develops symptoms should call a health care provider before arriving at a clinic or emergency department so staff can take precautions. The MMR vaccine remains the most effective protection—two doses are about 97 percent effective—and officials recommend vaccination within 72 hours of exposure for those not fully immunized. Immunoglobulin given within six days may also prevent or lessen illness in certain high-risk people.

The exposure window at the Des Moines hospital spans several hours across the emergency department waiting room, the Blank Children’s Hospital emergency department, a hallway leading to inpatient elevators, and the fourth floor of the children’s hospital. That breadth raises the stakes for families with young children, immunocompromised patients, and infants too young for vaccination. Polk County Health Department has posted an online exposure survey and a phone line at 515-323-5221 for people unsure of their vaccination status or who fall into high-risk categories. Iowa HHS updates case counts weekly on Thursdays and will issue additional press releases if new public exposures are identified.

What makes this case significant is not just the number of locations but the convergence of travel-related importation and ongoing regional transmission. Iowa’s 50 cases this year already exceed typical annual totals, and the Wisconsin outbreak next door creates a persistent source of reintroduction. Health officials are effectively asking the public to do the work of contact tracing themselves—check the list, check your records, call if uncertain. That approach works only if vaccination rates are high enough to create herd immunity; in pockets where they are not, each imported case becomes a potential spark.