Why CDC isn't able to find an answer to 400-500 daily Covid deaths in US?

Who are the 400-500 people in the US who are still dying from this disease each day and what could be done to prevent these deaths?

Earlier this week, President Joe Biden seemed to commit one of his trademark gaffes by saying “The pandemic is over.” The backlash was swift. That’s understandable, given that hundreds of people are still dying from Covid every day. But President Biden may be doing what comes naturally to many of us — judging the situation by our own experiences.
 

To truly understand where we are in the Covid pandemic, we need to be able to answer an essential question: Who are the 400-500 people who are still dying from this disease each day and what could be done to prevent