Yeah but you're still wrong. Their vaccines is just as effective at 3 doses for severe outcomes compared to mRNA vaccines.

https://www.economist.com/graphic-detail/2022/04/19/how-chinas-sinovac-compares-with-biontechs-mrna-vaccine

The US has a sub 10% booster rate for the past 6 months so it's a moot point anyway. That's why covid is rampant worldwide. No one is boosting anymore.

Which brings us to the last point. You're afraid of variants from 1.4 billion Chinese but the 6 billion other non Chinese that got covid in the last year or so didn't collapse society. Get a grip.