Measles exposure reported at OKC airport, Guymon Walmart over Memorial Day weekend

OKLAHOMA CITY — A measles exposure occurred at the Oklahoma City airport during Memorial Day weekend, state health officials said Tuesday.

The exposure lasted from 11:15 p.m. May 27 until 1:30 a.m. May 28 at the Will Rogers World Airport.

Another exposure happened the same weekend in Guymon at a Walmart Supercenter, 2600 U.S.-64, from 10:30 a.m. to 2 p.m. May 28.

Individuals who were at an exposure location outside of the specified timeframe are not at risk, the Oklahoma State Department of Health said.

Health officials advise that individuals who might have been exposed and have no immunity from vaccination or previous infection should isolate themselves from public settings for 21 days from the date of their potential exposure.

Measles is contagious four days before the onset of a rash and until five days after the rash appears, according to the Health Department website.

Oklahoma so far has recorded 20 measles cases in 2025. That includes 17 test-confirmed infections and three probable cases in which a person was symptomatic.

Seventeen of the 20 cases involved people who were unvaccinated for measles. One person had received two doses of the measles vaccine, and two others’ vaccination status was unknown.

Two doses of the measles, mumps and rubella vaccine are 97% effective against measles and 86% effective against mumps, according to the Centers for Disease Control and Prevention. One dose is 93% effective against measles, 72% effective against mumps and 97% effective against rubella.