The Centers for Disease Control and Prevention released a case report Wednesday involving a high "attack rate" at a Chicago gym, where infrequent mask wearing was reported. In August of last year, during one week of a high-intensity fitness class, 55 out of 81 attendees developed COVID.
55 of 81 Chicago gym-goers, infrequent mask-wearers contracted COVID-19. See story here. https://abc7chicago.com/health/55-of-81-chicago-gym-goers-infrequent-mask-wearers-contracted-covid-cdc/10367175/