Elderly & Co-Morbidlity-Ridden Must Stay Cooped-Up Until Herd Immunity Achieved Thus the Sooner the Better Right?

Translate:

The longer it takes to achieve herd immunity against the wuhan virus, the longer the old folks and people with underlying conditions should maintain social distancing, so considering that the curve of new hospitalizations for the wuhan was flattened two months ago, wouldn’t it be best that the young and of middle age who are fit should mingle as usual that herd immunity be achieved more quickly so that those practicing social distancing can return closer to normal activity more quickly?