233 staff members at 2 San Francisco hospitals have tested positive, most in breakthrough Delta infections.
By BY EDUARDO MEDINA from NYT U.S. https://ift.tt/3zXEkda
By YULIYA PARSHINA-KOTTAS, KARTHIK PATANJALI, JEREMY WHITE, BENJAMIN WILHELM and EVAN GROTHJAN from NYT Science https://nyti.ms/2B9tBka
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