For all we know, a worse one swept through the population 3000 years ago and inferred some genetic immunity. Or they have cross immunity from recent infections.
It’s weird this never gets talked about, considering how all of the countries near China did quite well (relatively).
Many people thought covid was not a big deal from because how easy the first wave went through. The vaccine slots were mostly free till a month back when the crunch started.
Credit goes to successive governments from various parties, who have largely not politicized the issue.
It also helps that the previous and current generation have seen the effects of non-vaccination, like polio afflicted ones.
In general, the population goes by the word of the medical establishment and there are no nonsensical opposing voices.
What is happening in USA is puzzling to me. Just goes to show that you can have all the wealth, infrastructure, research and qualified personnel in the world and still be beholden to crackpot ideas and conspiracy theories.