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Masking and social distancing until a vaccine could be developed prevented roughly 800,000 COVID-19 deaths in the U.S., according to CU ����Vlog�ƽ�� research.

The authors gathered national mortality data and data from blood samples to estimate how many people had been infected, vaccinated or died at various points from 2020 to 2024.

They found that 68% of Americans got vaccinated before being infected. Had they gotten COVID for the first time without being vaccinated, their risk of dying would have been as much as four times higher.

“Without a behavioral response, vaccines would have come too late to save lives,” the authors wrote.

They acknowledged that distancing measures came at “tremendous economic, social and human cost” and called for the U.S. to develop a more centralized system for gathering relevant data to better target behavioral guidance during future pandemics.