You are correct there, been traveling to a dozen countries recently and did not consider China. Do they even let in biz people and tourists without long quarantine? So you are spot on, I did not consider China, and am accused of a racist comment now? Beware dimwits.
What comes around, goes around. Others might call it karma. Remember in January 2020, Hua Hin was sprawling with Chinese - and then the whole mayhem took its course.
So are we to repeat the official Chinese propaganda in here that Covid was brought upon to the world by the West a.k.a. foreigners, as the elderly Thai accused a farang in the Skytrain?
It's probably safe to say, but of course not proven, that the virus somehow originated in Wuhan. Even though strains were found months before in Italy and few other places, according to wastewater analyses.
In regards to China I don't even mind to be called a racist. Look what they do to their own people and the planet, just to mention their complete disgregard for personal freedoms, wildlife, etc. I wish China could be a source of inspiration. It is not.
As to Thais wearing masks before Covid: a few, but certainly not more than 5-10 percent. And then only when PM 2.5 count was very high.
I am a firm believer in the self-healing properties of the body, and the immune system can and has to be challenged and trained. At this stage it is likely better for the whole population to face the (weaker) strains than trying to remain uninfected, at the cost of having a non-responsive immune system that's not trained.
That doesn't mean I'm an antivaxxer. Recently got my second booster, all fine over here.