Emerging Infectious Diseases (May 2023)
Mpox among Public Festival Attendees, Chicago, Illinois, USA, July–August 2022
Abstract
We investigated an mpox outbreak after a 2022 LGBTQ event in Chicago, Illinois, USA. Among case-patients, 38% had received 1 dose of mpox vaccine, none 2 doses; most reported sexual activity during the probable exposure period. Among other preventive measures, persons at risk should complete mpox vaccination 14 days before an event.