Could it be side effects from having gotten Covid or the Covid vaccine? I had gotten the virus 3 times even though I did get the vaccine and booster and now two-three years later I have vascular problems. I had it in my family tree but I did not suffer from it before. I think the virus turned on the genetic switch. Maybe that is what is going on in China.
There are still some things about Covid that are unclear. Maybe it's a side effect of Covid, as you say. I guess we will never know the answer. Those who warned everyone to get vaccinated disappeared after the dangers of these vaccines were revealed.
I don't know if the world is ready for a new pandemic. After Covid, many people will avoid vaccines and I don't know if this is the right or wrong behavior.
Maybe the situation is, as you say, revealing a disease in your genetics. I hope people can find answers to these questions in their minds.