“The new guidance suggesting people who have been exposed don’t need to quarantine but should instead wear a mask is likely to accelerate the spread of disease, especially because they don’t even say what kind of mask. What is, in their view, a ‘high-quality mask’? And, given the lack of mask mandates and the overall low rates of people wearing masks, it seems unlikely people will comply with this anyway.”
https://www.theguardian.com/us-news/2022/aug/19/us-covid-cases-mandates-deaths