Good catch. Strange, Dr. Fauci is never brought that up. You are absolutely right based on that number the actual number is likely over 100 million undocumented cases. All likely asymptomatic or someone who just I had such a minor reaction in for such a short duration they assumed it was a common cold.
At the link CDC estimates about 13 million asymptomatic cases last year. Roughly one case in 7 or 8 I think.
Some dispute whether an asymptomatic case develops enough resistance to significantly fight off a new infection but that’s not for sure. Suspect the medical system just prefers the known effect of the virus to what may be a more random response from infections.
and I’ll just repeat those CDC estimates don’t include any of this year.