Is Immunity a Case of Rothbard’s Lost Knowledge?

“I’m writing this under a five-month near-global lockdown for fear of a new virus. And just today, a major epidemiologist in the UK, Raj S. Bhopal, dared say precisely what my mother said at the outset of this disease: the way we must manage it is to develop natural immunities to it. Yes, he said the taboo thing: people who face no fatal threat need to get it. This is precisely what my mother told me back in February.”