How small is the number of at-risk people? A quick Googling suggests about 60 million people over 65 in the US. Then we should add some millions for problems l

How small is the number of at-risk people? A quick Googling suggests about 60 million people over 65 in the US. Then we should add some millions for problems like diabetes. So, 1 in 5? 1 in 4? Further, some young people seem to have permanent lung damage from the disease.