The lockdown wae first time in human history that well people were quarantined. Not that I'm an expert but I wonder if that practice actually prevented a benign version from spreading and ending the pandemic. The experts admit they're not sure why pandemics end. The prevailing opinion is that SARS1 ended because a benign version mutated and infected everyone ( the antibodies it produced protected one from the pernicious version). So if there is a benign version of SARS2 out there, and that person is asystematic, he'll test positive and will be quarantined and prevented from infecting everyone.
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