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COVID-19 Lethality Not Much Different Than Flu, Says New Study – Reason.com
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In the new study, the researchers sought residents through Facebook to whom they could administer the antibody tests. The results were an unadjusted prevalence of coronavirus antibodies of 1.5 percent. After making various statistical and demographic adjustments, researchers calculated the likely prevalence ranged from 2.49 to 4.16 percent. At the time that these tests were administered, there were about 1,000 confirmed COVID-19 cases and 32* deaths from the disease in Santa Clara County. The upshot is that "these prevalence estimates represent a range between 48,000 and 81,000 people infected in Santa Clara County by early April, 50- 85-fold more than the number of confirmed cases."
Using these data, the researchers calculated the infection fatality rate, that is, the percent of people infected with the disease who die: "A hundred deaths out of 48,000-81,000 infections corresponds to an infection fatality rate of 0.12-0.2%," they report.* That's about the same infection fatality rate the Centers for Disease Control and Prevention (CDC) estimates for seasonal influenza.
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