This is a huge deal in the vaccination data stakes. 92% vaccinated says the CDC, but only 75% in reality, says the study.
This isn’t an antivax potshot against the vaccine safety - the author, a man known for his focus 
, complains that this means that fewer Americans are protected.
But if the reality is 25% unvaxed when it has been counted as 8% then every comparison of vaxed vs unvaxed is out the window - because the denominator in the unvaxed is wrong by a factor of 3.
Possibly in the US the dramatic effect has just been swallowed up in the CDC massaging machine anyway.
The UK has a similar problem in estimating the number of unvaccinated, though not to the same scale. Prof Norman Fenton has shown that UK data uses the lowest possible estimate, known to be an underestimate.
It’s pretty surprising that 25% of Americans have managed to avoid the covid shots.
Edit: the art of data fiddling has not been perfected - blatant interventions show up somewhere.
“In every state, older people were more likely to get vaccinated against COVID-19 than younger people. But the CDC says more 65-year-olds have gotten the shots than there are 65-year-olds in the U.S.”
Maybe that’s what AI is for 
ED
CDC overestimating number of vaccinated Americans, Northeastern professor and the COVID States Project say
A Northeastern professor says the Centers for Disease Control has significantly overestimated the number of people who have received at least one COVID shot, leading the federal agency to paint a rosier picture of vaccine compliance than actually exists.
One of the authors of the COVID States Project’s recent report on nationwide vaccination rates, David Lazer, says his report shows 75% of adults in the United States received at least one vaccination against the coronavirus, compared to the 92.1% reported by the CDC.
“That’s a very, very big difference,” says Lazer, a Northeastern distinguished professor of political science and computer sciences.
The CDC is “saying 8% of the population has gotten no vaccine, and we’re saying 25%,” he says. “So we’re saying three times as many people have gotten zero vaccines.”
“The reason for that is pretty simple,” Lazer says.
The CDC is relying on information reported by states, which in some cases counts individuals going for booster shots as separate individuals getting the first shots in the series, especially in cases when people forget to bring their vaccination cards for the boosters.
“It’s not like they’re collecting Social Security numbers” to verify the data, Lazer says.
“We’re basically saying the population is significantly less protected than what the CDC is saying,” he says.
The COVID States Project’s report—its 100th since launching in May of 2020—also shows that vaccination rates have plateaued in the last year and a half.
“It’s barely budged. It’s not like we’re converting all these vaccine resistant people from October 2021. If you weren’t vaccinated in October or November of 2021, you’re not vaccinated now,” Lazer says.CDC Overestimating Vaccinated Population in US, Report Finds
