Once more, in the hope it will sink in this time, there may be no such thing as "herd immunity" for COVID-19. It's a coronavirus and coronaviruses typically are defended against by the immune system for no more than a few months, if THAT long. Here is a study that indicates such is likely with/for COVID-19.
Will you read it and try to understand it or just ignore it?
The best example of a coronavirus for which there is a short span of immunity is the common cold. You've been told this, Al, on more than one occasion, and now once again. Yet, you continue with the "herd immunity" premise as if herd immunity is assured if everyone who is young plus healthy simply gets sick or infected but possibly remains asymptomatic, gets it over with and, as you would put it, gives the virus no place to go. It ISN'T that simplle!
Again, in case you've forgotten:
[...] In the absence of effective treatment or biomedical prevention, efforts to control the coronavirus disease 2019 (COVID-19) pandemic have relied on nonpharmaceutical interventions such as personal preventive actions (eg, handwashing, face covers), environmental cleaning, physical distancing, stay-at-home orders, school and venue closures, and workplace restrictions adopted at the national, state, and local levels. In addition to these public health interventions, development of herd immunity could also provide a defense against COVID-19. However, whether immunity occurs among individuals after they have recovered from COVID-19 is uncertain. Many human infections with other viral pathogens, such as influenza virus, do not produce a durable immune response. Understanding whether and how recovery from COVID-19 confers immunity to, or decreased severity of, reinfection is needed to inform current efforts to safely scale back population-based interventions, such as physical distancing. Understanding potential postinfection immunity also has important implications for epidemiologic assessments (eg, population susceptibility, transmission modeling), serologic therapies (eg, convalescent plasma), and vaccines. [...]
[...] White House health advisor Dr. Anthony Fauci said he worries about the "durability" of a potential coronavirus vaccine, saying there's a chance it may not provide long-term immunity. [...]
You argue from the assumption that, if people over 60 are sequestered in their bunker of imprisonment, for however long it would take, those under 60 or 50 could do what they want when they want; no problems to be had. Have you noticed that, in Florida, Texas and Arizona there are now a lot of forty and fifty-somethings in hospitals? Did you notice that the U.K.'s Prime Minister, in his mid-fifties, had to be hospitalized with COVID-19? Most in their 40s or 50s who are hospitalized will probably survive. But let's not pretend their experience while there won't be traumatic. Given evidence now surfacing that the infllammation which comes with COVID-19 is causing damage to vital organs, potentially for the rest of the patient's life, including damage to the brain, this is NOT a matter where the elderly can be safely locked away while others won't suffer and suffer greately!
Even if it were possible or likely that herd immunity could be achieved naturally, it would take longer than the "6 months" you've previously stated, as if that's likely. In Sweden, they are, for the most part, letting it all hang out, so to write. It has been nearly 6 months and they're not in the same galaxy as "herd immunity"!
As for schoolchildren: I accept they need to go back to school and for more reason than making it possible for Mom & Dad to go back to work. The psychological impact on kids -- their amplified fear of COVID-19 and the specter of pandemics to follow -- could be signifant and life-altering for those so early in the process of socialization. Yes; most of them will not suffer much physically. Some won't suffer at all. But this is NOT *JUST* about THEM. It's also about aging parents or grandparents living in the same home with those children as well as school staff and particularly teachers who are in their 40s, 50s or 60s. They all deserve some consideration. Only in Fantasyland could schools be staffed or REstaffed exclusively with twenty and thirty-somethigns by August or September. Only in Fantasyland, where it's not necessary for midde-aged adults with children to bring THEIR aging parents into the home because no one can afford to send those elderly parents -- the children's grandparents -- to some facility or place where they will be well-cared-for, can we expect that children, when they come home, are not likely to spread COVID-19 to the "vulnerable". But you already knews this, didn't you, Al?