I'm sure that ADHD is comorbid with a variety of lifestyle and health problems that make COVID somewhat worse. But in general it does not directly affect health

I'm sure that ADHD is comorbid with a variety of lifestyle and health problems that make COVID somewhat worse. But in general it does not directly affect health. Why not simply provide it to those with the comorbidities? I consider community spread mostly a nonissue. We've known for many decades that if you can't get the replication rate below 1, the correlation between replication rate and how many get it is chaotic. We can't get the replication rate of COVID below 1, so there is little correlation between policies and outcomes. Obviously this does not apply if you are at risk or a caregiver of someone at risk. That's why saner countries than the USA (Germany is my favorite example) do not recommend vaccination against COVID for the general public.