CDC Serology Survey

Shake my fist
Knock on wood
I got it bad
And I got it good
--Robert Palmer

It does appear that the CDC is conducting a CV19 antibody survey at select locations in the US. Although it reports 10 locations with samples to be collected every four weeks, results reported so far are only from six sites and the data appear to be from samples taken 2-3 months ago.

From the data they do have, seroprevalence in the April period appeared to average 3-4%--more than 10x the infection rate inferred from reported positive cases at that time. These results are in-line with other scattered antibody studies conducted during that time window.

Infection rates have certainly increased since then. Applying the 10x rule to the current 'official' CV19 cumulative case count of about 2.5 million implies that 25 million people in the US have been infected. Using a total US population of about 330 million, that implies a 7.6% prevalence.

Would not be surprised if current antibody studies indicate at least that prevalence.