Stylist A worked with clients for 8 days while symptomatic, as did stylist B for 5 days. Stylist B worked from day 3 to day 8 while symptomatic before self-isolating and seeking PCR testing, which returned a positive result for SARS-CoV-2 on day 10. During Stylist A’s symptomatic period, the two stylists interacted while neither was masked during intervals between clients. On day 3, after working with stylist A, stylist B developed respiratory symptoms. Although self-isolation was recommended after testing on day 6, stylist A continued to work until the test returned a positive result, at which time stylist A was excluded from work by salon A. Stylist A worked from day 0 to day 8 with COVID-19 symptoms before receiving a diagnosis of COVID-19 by polymerase chain reaction (PCR) testing. Broader implementation of masking policies could mitigate the spread of infection in the general population. As stay-at-home orders are lifted, professional and social interactions in the community will present more opportunities for spread of SARS-CoV-2. These findings support the role of source control in preventing transmission and can inform the development of public health policy during the COVID-19 pandemic. The citywide ordinance and company policy might have played a role in preventing spread of SARS-CoV-2 during these exposures. After public health contact tracings and 2 weeks of follow-up, no COVID-19 symptoms were identified among the 139 exposed clients or their secondary contacts. After stylist B received a positive test result on day 10, salon A closed for 3 days to disinfect frequently touched and contaminated areas. None of these stylists reported COVID-19 symptoms. Other stylists at salon A who worked closely with stylists A and B were identified, quarantined, and monitored daily for 14 days after their last exposure to stylists A or B. Stylists A and B and the 139 clients followed the City of Springfield ordinance* and salon A policy recommending the use of face coverings (i.e., surgical masks, N95 respirators, † or cloth face coverings) for both stylists and clients during their interactions. A total of 139 clients were directly serviced by stylists A and B from the time they developed symptoms until they took leave from work. A second hair stylist (stylist B), who had been exposed to stylist A, developed respiratory symptoms on (day 3), and worked with clients at salon A until day 8 before seeking testing for SARS-CoV-2, which returned a positive result on day 10. On (day 0), a hair stylist at salon A in Springfield, Missouri (stylist A), developed respiratory symptoms and continued working with clients until day 8, when the stylist received a positive test result for SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19).
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