What if you don't build up immunity? I've read that there it's not certain we can build up enough immunity. Everybody takes this for granted but what if your immunity lasts for two weeks?
Then I would die, if there is no lung ventilator for me around.
Eventual all the people vulnerable would die too. And the overwhelming rest would live on.
Right, until we either go extinct as a species or natural selection affords us the ability to fight it off and that new impervious population survives and thrives, thus passing on the immunity to new generations of humans.
