Health Care Blog December 12, 2024
Early on in the COVID-19 pandemic a seroprevalence study from Santa Clara indicated that the viral spread was far greater than was believed. The study suggested that the infection fatality rate (IFR) was much lower than the case fatality rate and perhaps even lower than the suspected IFR. The researchers estimated that 2.8% of the county had been infected by April 2020. The virus was contagious and, most importantly, caused many asymptomatic infections.
The study, released as a preprint within a month of the lockdown, should have been published by the NEJM or Lancet. The specificity of the immunoassay was a whopping 99.5% and could not have been lower than 98.5%. Instead, it was roundly criticized by born-again methodological...
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