As medical staff in the US face a rising number of COVID-19 cases with a dwindling supply of protective gear, the Centers for Disease Control and Prevention (CDC) has updated its advice, suggesting that, in a crisis, healthcare workers could use bandana or scarves over their faces while treating patients, despite the fact that neither are proven to be effective.
In the recently updated guidelines for dealing with mask shortages, the CDC recommends that medical professionals "might use homemade masks (e.g., bandana, scarf) for care of patients with COVID-19 as a last resort" if other equipment is not available.
I have heard the above from a couple of different news outlets today. 3/19/20
https://www.businessinsider.com/cdc-recommends-health-workers-use-bandanas-face-masks-crisis-2020-3
https://www.cnn.com/videos/health/2020/03/19/cdc-guidelines-masks-coronavirus-gupta-newday-vpx.cnn
