Asymptomatic COVID-19 findings dim hopes for ‘herd immunity’ and ‘immunity passports’ | CBC News
A closer look at people who tested positive for COVID-19 but never developed symptoms has found that such asymptomatic carriers have few to no detectable antibodies just weeks after infection, suggesting they may not develop lasting immunity.A new study on COVID-19 immunity has found that people who were asymptomatic or mildly symptomatic had their antibodies…