https://www.nytimes.com/2021/05/07/health/coronavirus-airborne-threat.html?action=click&module=Top%20Stories&pgtype=Homepage
Why it took so long to correct the guidance:
https://www.nytimes.com/2021/05/07/opinion/coronavirus-airborne-transmission.html?action=click&module=RelatedLinks&pgtype=Article
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