I bet we could still keep it at an acceptable level (which I would define as below 1 million), if we just quarantine the seniors and the immuno-compromised. We wouldn’t be wreaking nearly the destruction that we are now.
You do realize of course, that anyone can catch this?
It is not just the seniors and immune compromised that can get CV19.
And, to make matters worse - ANY infected person can pass this - whether they are showing symptoms or not.
Hospitals worldwide are seeing a lot of cases under 50 - many in ICUs.
It’s also been estimated that 86% of all cases are asymptomatic. So, those people - even if not sick or hospitalized, can continue to spread. And with a high R0, it’s been estimated that a single person can infect thousands. (One study showed up to 59,000 infections from a single person over multiple iterations of communicability).
I don’t see a way to isolate just seniors and immune compromised and ever get this under control. It’s going to rage through our population as long as there are people spreading it - regardless of their age.