[A strike]

"Did we go to war with Mexico over the H1N1 virus which started on some swine farm in Mexico? Where did you get that?

[SmokingJoe]

The swine-origin influenza A (H1N1) virus that appeared in 2009 and was first found in human beings in Mexico, is a reassortant with at least three parents. Six of the genes are closest in sequence to those of H1N2 ‘triple-reassortant’ influenza viruses isolated from pigs in North America around 1999-2000.

https://virologyj.biomedcentral.com/articles/10.1186/1743-422X-6-207