FILE - A man holds up a memorial to those who died of Covid-19. RELATED: Delta variant: What to know about the spreading coronavirus strainAmong 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.