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

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

COVID-19 false dichotomies and a comprehensive review of the evidence regarding public health, COVID-19 symptomatology, SARS-CoV-2 transmission, mask wearing, and reinfection, BMC Infectious Diseases

N95, KN95 masks provide best protection against covid, CDC study shows - The Washington Post

Masks and Omicron Q&A: What kind of mask should you wear and for how long? An expert explains

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

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

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

Coronavirus Dashboard (COVID-19)

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

White House says it will distribute 400 million free N95 masks to protect against omicron

Face masks during the COVID-19 pandemic in the United States - Wikipedia