> They dropping like flies in China so I doubt their immunity is better.
Well, official numbers in China are extremely low, but we can’t trust them, of course. Let’s look at Taiwan actually had peak of deaths in last 2 months comparable to US in 2020! Probably, because they met Omicron without previous immunity? But total for whole epidemic so far US has 3000 deaths per million, Israel Canada 1200, Taiwan and Japan 300 – 10 times less than USA. China’s lying numbers are 4 per million …