One study conducted by researchers at the University of California, Berkeley examined interventions taken by six countries and found that about 531 million cases of COVID-19 were prevented or delayed. And the other study, conducted by Imperial College London, found that in 11 European countries, the virus transmission was extremely reduced and about 3.1 million lives were saved.
But the researchers note that the pandemic is still ongoing, so these successes are contingent on people continuing to be careful.
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