On Friday, Dec. 4 the CDC published in a weekly report updated guidelines that recommend “universal use of face masks” as COVID-19 cases, hospitalizations and deaths climb across the nation at dangerous rates. “Face mask use is most important in indoor spaces and outdoors when physical distance of 6 feet (or less) cannot be maintained,” the CDC’s report reads. Read more: What the CDC says about face masks -- a refresherThe updated guidelines come amid recent research that shows face masks not only prevent a person from spreading COVID-19, but they also provide some protection to the wearer -- though to a lesser extent. In light of the new guidelines, the CDC is encouraging state and local governments to “issue policies or directives mandating universal use of face masks in indoor (nonhousehold) settings,” and to provide face masks to populations in need to help prevent the spread of COVID. Majority of the CDC’s previously-issued mask guidelines have not changed, however, including what types of masks to wear and how to wear them.

On Friday, the Centers for Disease Control (CDC) posted an update to guidance on COVID-19 that said the virus could be spread through the air through aerosolized droplets. On Monday, the CDC walked back the update, claiming it was posted erroneously. “A draft version of proposed changes to these recommendations was posted in error to the agency’s official website. CDC is currently updating its recommendations regarding airborne transmission of SARS-CoV-2 (the virus that causes COVID-19). The WHO says those most at risk from airborne spread are doctors and nurses who perform specialized procedures such as inserting a breathing tube or putting patients on a ventilator.