“It was only a mater of time” before monkeypox made it to congregate settings, a pediatric infectious disease specialist told Fortune, after Illinois state officials announced Friday that a daycare worker had been diagnosed with the smallpox-related virus.

All children and adults at the unidentified daycare center in Champaign County, Illinois, were being screened, and no additional cases had been identified, state health officials said Friday, adding that Gov.

Every state except for Wyoming and Montana had cases identified.

Illinois health officials Friday said the U.S.

Food and Drug Administration had authorized the use of Jynneos, licensed for use in adults 18 and older, for potentially affected children at the center, “without jumping through normal hoops.” Mobile testing and vaccination services were on site, they added.

Because Jynneos is licensed, not just authorized under an emergency use authorization like initial COVID vaccines were, it can be used “off label”—for instance, given to children who have been exposed, Brugler Yonts said.