N95 masks are still needed as America reopens and Covid-19 cases surge - Vox

Five months into the pandemic, the Trump administration hasn’t taken charge of a supply chain that’s been stretched thin.

Are we done with face masks?

To block omicron, wear an N95 or other high-filtration mask : Shots - Health News : NPR

As U.S. COVID cases rise, will mask mandates return? : NPR

Effects of surgical masks on aerosol dispersion in professional singing

Governments respond to COVID-19

Two Companies Selling N95 Masks to Shut Down - The New York Times

What is the best face mask to wear to stop the spread of COVID-19? - ABC News

Frontiers Mask Wearing as Cultural Behavior: An Investigation Across 45 U.S. States During the COVID-19 Pandemic

Face Masks Are Again in Short Supply as Covid-19 Cases Surge - WSJ

A job not yet finished', Biden administration distributing free N95 masks across U.S.

An exploration of the political, social, economic and cultural factors affecting how different global regions initially reacted to the COVID-19 pandemic

Face masks during the COVID-19 pandemic - Wikipedia