As if Avengers: Endgame wasn’t dramatic enough, health officials in California are now warning moviegoers who attended the midnight screening of the flick at the AMC Movie Theater in Fullerton on April 25, 2019, that they may have been exposed to measles.
According to the Orange County Health Care agency, a 20-something woman, who did not know at the time that she had measles, was in the audience for the April 25, 2019 show. She was later diagnosed as the first confirmed case of measles in Orange County.
Since the highly contagious virus can stay in the air for up to two hours after the infected person has left, the agency advises anyone who was at the theater between the hours of 11 p.m. and 4 a.m. to check their vaccination history and keep an eye out for common measles symptoms which include a runny nose, fever, and a red rash.
Officials are also reminding people who think they may have the measles to call their doctor before going to the physician’s office to prevent infecting others.
After learning about the possible exposure, one of the movie theater employees, Carlee Greer-McNeill, told NBC Los Angeles that he never thought to feel unsafe at his job or anywhere in Orange County. She said, “If you know you have the measles, please don’t come to a movie theater, let alone a public place.”
Currently, the U.S. is in the middle of the worst measles outbreak since 1994, with 704 cases reported so far this year across 22 states. California, in particular, has been hit hard by the infectious disease, with 38 confirmed cases. The Health Care Agency urges people to get vaccinated if they aren’t already. “The MMR vaccine is a simple, inexpensive, and very effective measure to prevent the spread of this serious virus,” Dr. Nichole Quick, Interim County Health Officer, said in a press release.
This article originally appeared on Fatherly. Follow @FatherlyHQ on Twitter.