There isn't a "problem". Just saying. For work I usually need to make that trip. I expect that those two countries will expect some government issued document that I am vaccinated. If the US government doesn't get on board in an international way then I will not make the trip because I will not go if I have to quarantine for two weeks.
Frankly, I've been to Japan over 30 times and China 5 times and I'd be perfectly happy not going any more. But my employer will probably expect me to go so long as I don't have to waste two weeks in quarantine. Again, just stating facts.
I guess I don't understand what facts you're stating.
My mother-in-law has a card, issued by the government, stating that she's been vaccinated. It includes details, like the times and places and brand of of her two shots. Moderna.
Are you saying that foreign governments have higher standards than a southern Indiana health department's say so(or at least a reasonable facsimile)?
Oh, golly, has the USA lost credibility with foreign governments over the last few years? Could that be true?
We nuked Japan and they stopped messing with us. Didn't they?
Tom
Those cards are far too easy to fake. In the past it's not been a big deal, without the death cult travelers would simply get the shots needed for where they were going.