In May, two hairstylists at a salon in Springfield, Mo., tested positive for the coronavirus, potentially exposing 140 clients and six coworkers. On June 8, the city's health department determined that no one exposed contracted COVID-19.
The event was reported nationally as an example of the presumed impact of face coverings, which are recommended or required by many health authorities. Under the city's rules they are required for providers of personal-care services and their clients. “This is exciting news about the value of masking to prevent COVID-19,” said the city's health director.