From your link:
“The CDC received 3,907 reports of people who have been hospitalized with breakthrough Covid infections, despite being fully vaccinated. Of those, more than 1,000 of those patients were asymptomatic or their hospitalizations weren’t related to Covid-19, the CDC said.”
Out of about 160,000,000 fully vaccinated Americans. Something like 1/100,000. Excellent protection!
About 750 deaths among the vaccinated, out of over 600,000 deaths is about 99.9% Protection. Excellent!
Thank God that we have such powerfully effective vaccines, or hundreds of thousands more would likely have died from COVID by now, in the USA alone.