The percentage of people vaccinated with one or two vaccines in China is high, but the unvaccinated are concentrated among the elderly. That is different to places like the UK where those who have refused the jab are more likely to be under 65.
The protection supplied by the sino-vaccines is decent as long as people have had three jabs with the third being relatively recent, but one or two jabs only is ineffective, and even the effects of a third jab will be weak if it was had some time ago, as the immunity supplied by the sino-vaccines fades more rapidly.
This is different to the mRNA vaccines, where the protection is more long lasting, and for which two jabs or even a single jab will already provide a fair bit of protection.
All this explains why China’s big wave is causing more disruption in its largely unexposed population than the big wave in New Zealand etc. did; New Zealand also managed to keep the vaccine at bay before allowing the virus to spread among the population, but New Zealand first got virtually everyone jabbed with lots of high-quality mRNA vaccines before opening the floodgates.
There is no evidence for new variants in China and I’m getting tired of invented stories about “There must be a Vairy-Ant” being created every single time we have this kind of development.
I’m tempted to suggest embarrassing the Chinese government by slapping some new restrictions on Chinese passengers arriving (like requirements to show a negative test and a vaccine proof) just because the Chinese government is so utterly infuriating and awful and it’s kind of fun to do stuff they are bound to find annoying. However….. let’s not stoop to such pettiness, and no I am not being serious.