> Do they think anyone on Earth outside of China finds this plausible or is it purely for domestic consumption? FWIW, I made an effort to get outside my bubble

> Do they think anyone on Earth outside of China finds this plausible or is it purely for domestic consumption? FWIW, I made an effort to get outside my bubble recently and talked to a right-leaning acquaintance, who as it turns out happened to be somewhat conspiracy-minded (which from what I gather isn't uncommon these days). They were into this theory. So the answer to (the first part of your question) is, surprisingly, yes. This conspiracy theory apparently has some traction in (at least some subset) of the US, although probably not the subset that visits HN regularly. For an explanation of why he believes this, he pointed me to a series of articles by a guy named Ron Unz. I won't link to his site here since it is a far-right site that contains a variety of objectionable (anti-Semitic etc) content, although at a glance mainly from other authors. Skimming it, it was actually more highbrow than I was expecting, drawing on books on US bioweapons programs during the Korean War (real programs, at least according to Wikipedia), and how, at the time, such secret programs weren't reported by the media and how easily the public dismissed their existence as simply foreign propaganda. Which is a fair enough point, I guess. I'm not saying I buy it (I'm doubtful I even have the motivation to go through a book-length series on the topic and do enough fact checking to measure how credible it is). But adding this historical context, it made people paranoid enough to consider such things seem a little less totally crazy than my initial impression of the matter before talking to them.