4 ms·

You can get to know how many people have natural immunity without testing them all. In a country as large as US it would be enough to test probably one in 10 t

• nradov 5y ago
  The UK public health officials have been doing random population sampling with antibody tests throughout the pandemic. https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/conditionsanddiseases/bulletins/coronaviruscovid19infectionsurveyantibodyandvaccinationdatafortheuk/1september2021 https://www.ons.gov.uk/peoplepopulationandcommunity/healthan... Unfortunately that never really happened in the US. There were a few small seroprevalence studies in limited areas at specific times but nothing consistent on a nationwide basis. Also note that there is more to immunity than antibodies, so assaying antibody levels alone will underestimate the level of immunity in the population. We should also be testing memory cell activity now that a test is approved. https://www.fda.gov/news-events/press-announcements/coronavirus-covid-19-update-fda-authorizes-adaptive-biotechnologies-t-detect-covid-test https://www.fda.gov/news-events/press-announcements/coronavi...