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Biden Tells Governors of Florida, Texas to Lead: Virus Update

A city-operated mobile pharmacy advertises the Covid-19 vaccine in Brooklyn, New York, on July 30.

A city-operated mobile pharmacy advertises the Covid-19 vaccine in Brooklyn, New York, on July 30.

Photographer: Spencer Platt/Getty Images
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Tyson Foods Inc., America’s biggest meat company, is requiring workers at U.S. offices to be fully inoculated by Nov. 1. New York City will require anyone dining indoors at restaurants or exercising at gyms to show proof of their inoculation.

The spread of the delta coronavirus variant has pushed the threshold for herd immunity to well over 80% and potentially approaching 90%, according to an Infectious Diseases Society of America briefing.