2021 preview: How soon will a covid-19 vaccine return life to normal?

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By Michael Le Page

, Clare Wilson

, Donna Lu

, Graham Lawton

and Adam Vaughan

People are enjoying the sun while taking social distance in Melbourne, Australia, in October 2020, after the restrictions have been eased

Darrian Traynor / Getty Images

IF 2020 felt like hell, be warned that we are not out of the fire yet, even if we are moving in the right direction. Welcome to 2021, also called purgatory.

There is little doubt that vaccines are the key to ending the pandemic. One recently modeling study predicted that vaccination of only 40 percent of U.S. adults during 2021 would reduce the rate of coronavirus infection by about 75 percent and cut hospitalizations and deaths from covid-19 by more than …



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