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Covid-19: Stop tracing and quarantining of contacts, says Ministerial Advisory Committee, sampling errors galore
The proportion of people with immunity to Covid-19 (from infection and/or vaccination) has risen substantially, exceeding 60-80% in several serosurveys [measuring of antibody levels against infectious diseases].

"We have learned more about the manner in which Covid-19 is spread, and also now have to contend with variants of concern whose epidemiology differs from that of the ancestral strains of SARS-CoV-2.
[...]
"In addition, among the small proportion of symptomatic cases, testing is far from universal, since patients may not seek testing when their symptoms are mild and when testing would be burdensome and expensive. Furthermore, the SARS-CoV-2 test sensitivity is suboptimal, sometimes leading to false negative results.

"The inability of the current testing strategy to identify the bulk of cases is illustrated by the high SARS-CoV-2 seropositivity rates seen across multiple provinces in serosurveys, implying that only a fraction of cases (perhaps one in 10, or even less) are ever diagnosed."

by Cat on Sun Dec 19th, 2021 at 09:11:16 PM EST
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