Is it just me, or does that fact seem to suggest that perhaps this virus didn’t naturally evolve?
An earlier article that I read said that most of the people, including those in Mexico, had no contact with swine and that the transmission was from human to human.
I am assuming that this is an airborne virus. I don’t know if the people in the US had had any contact with the Mexican victims; it actually sounded as if the US victims had gotten it first, since most of them had already recovered by the time it was detected in Mexico. This may mean simply that it wasn’t identified right off the bat in Mexico (it strikes young people and doesn’t seem like a typical flu), or it could be that it started in two separate places, or that somebody from the US brought it to Mexico - or vice versa and it just wasn’t detected in the US until there were enough cases to make a connection.
It seems a little odd, both with respect to its composition (swine/avian/human?) and its spread.