Or injecting "volunteers" with ebola or (if they can get it) smallpox and flying them here. But we don't need quarantines. No, no, no. Bad things will happen if we try to do that. I haven't quite figured out what that is, but it will be bad if we close the border to disease.
The “bad thing” that happens when you prevent your population from being infected with a third world killer plague
is that your population isn’t “forced to care” about other countries with a third world plague.