Analysis: Nearly all COVID-19 deaths among unvaccinated people

Among them: Only about 45 states report breakthrough infections, and some are more aggressive than others in looking for such cases. So the data probably understates such infections, CDC officials said.

Still, the overall trend that emerges from the data echoes what many health care authorities are seeing around the country and what top experts are saying.

Earlier this month, Andy Slavitt, a former adviser to the Biden administration on COVID-19, suggested that 98% to 99% of the Americans dying of the coronavirus are unvaccinated.

And CDC Director Dr. Rochelle Walensky said on Tuesday that the vaccine is so effective that “nearly every death, especially among adults, due to COVID-19, is, at this point, entirely preventable.” She called such deaths “particularly tragic.”

Deaths in the U.S. have plummeted from a peak of more than 3,400 day on average in mid-January, one month into the vaccination drive.

About 63% of all vaccine-eligible Americans — those 12 and older — have received at least one dose, and 53% are fully vaccinated, according to the CDC. While vaccine remains scarce in much of the world, the U.S. supply is so abundant and demand has slumped so dramatically that shots sit unused.