February 24, 2021

Community Transmission of SARS-CoV-2 at Three Fitness Facilities — Hawaii, June–July 2020

Category: Article Summary

Topic: Transmission

Keywords (Tags): transmission

An outbreak of COVID-19 cases occurred that was linked to a fitness instructor resulting in cases at 3 fitness facilities, with the highest attack rate (95%) occurring in classes that were taught <1 day before the onset of symptoms in the instructor. Twenty-one cases of COVID-19 were linked to an index case fitness instructor in Hawaii in July, 2020, including a case in another fitness instructor. The aggregate attack rates in classes taught by both instructors <1 day, 1 to <2 days, and ≥2 days before symptom onset were 95% (20 of 21), 13% (one of eight), and 0% (zero of 33), respectively. Among the 21 secondary cases, 20 (95%) had symptomatic illness, two (10%) of whom were hospitalized. At the time of the outbreak, mask use was not required in the facilities. 

Groves et al. (Feb 24, 2021). Community Transmission of SARS-CoV-2 at Three Fitness Facilities — Hawaii, June–July 2020. MMWR. https://doi.org/10.15585/mmwr.mm7009e1