The argument that I keep hearing is to have all of the "vulnerable" shelter while everyone else goes out there and gets it, builds persistent neutralizing antibodies (if they exist), and then (poof!) we'll have herd immunity.
problem 1: 80-90% of the population needs to get immunity (by disease, or by vaccine) for the population to have herd immunity
problem 2: the vulnerable population is way more than 10-20%, since it includes:
-those over 60
those under 60 who are
-overweight. not just obese, but overweight
-have high blood pressure
-have high cholesterol
-have diabetes or pre-diabetes
-have blood clotting issues
-have asthma
-have any other respiratory condition
-smoke
-have any autoimmune disease
-have a weakened immune system for any reason
I'm not talking about a vulnerable person being in ALL of these categories, but in ANY of these categories.
problem 3: the vulnerable population is probably 3x above the number that can be protected and reach herd immunity for the population. Therefore, absent a vaccine, we need to identify two-thirds of them to "take one for the economy"
If problem 3 doesn't bother you, then you might be a Nazi.
The only realistic way to herd immunity (if it is even possible) is a safe and effective vaccine.
It also doesn't make sense to endure the economic cost of shutting down the economy until a vaccine is in hand, so when we "open up", people need to take things seriously (masks, distancing, no large groups) or else even half way to the old normal will be a long, long time away.
I have heard people say that they won't wear a mask in public. It is their right, they say. Sure, it may be. But I put it somewhere on the "not cool" list between intentionally farting on an elevator and spitting in somebody's face. Just do it. It isn't that much of a sacrifice. My WWII vet dad sacrificed a hell of a lot more very day for 3 years and never whined about it.
I am eager to get back to work in 3 days, with mask at the ready, working shifts in re-configured work spaces to ensure proper distancing.
We can re-start, sensibly, and not be denialists or anti-science stooges.
Sorry for venting, and dislike away.