EditorialKestlyn Willert takes a saliva-based COVID-19 test at the University of Minnesota?s field house in Minneapolis, Nov. 16, 2020. (Jenn Ackerman/The New York Times)
EditorialDr. Alberto Paniz-Mondolfi, a pathologist with the Mount Sinai Health System who led development of the new saliva test for coronavirus. (Chang W. Lee/The New York Times)
EditorialSafa Sareshwala, left, helped a student take a saliva sample at a coronavirus testing site for University of California, Davis students and faculty on Jan. 25, 2021, in Davis, Calif. (Max Whittaker/The New York Times)
EditorialA driver drops off a COVID-19 saliva test at an Intermountain Healthcare test center in Murray, Utah, on Thursday, Jan. 14, 2021. (Kim Raff/The New York Times)
EditorialLisa Ramos, center, and Melissa Trejo, left, while distributing at-home COVID-19 saliva tests at the Family Health Matters clinic in Fullerton, Calif., on Tuesday, Nov. 24, 2020. (Jenna Schoenefeld/The New York Times)
EditorialDr. Andrew Brooks, left, with the CEO of Vault Health, Jason Feldman, at RUCDR Infinite Biologics in Piscataway, N.J., July 2, 2020. (Bryan Anselm/The New York Times)
EditorialDr. Stephen Hahn, a commissioner at the US Food and Drug Administration speaks during a coronavirus briefing at the White House in Washington, April 24, 2020. (Anna Moneymaker/The New York Times)