Why would they start it off in Mexico though?
Lots of people who cross the US border to transport it throughout the US. Lots of people with marginal health to act as vectors for the disease.
It is probably coming from the area in the following article (if it is bioterror related). Perhaps it was not intentionally spread by it's transporters on the way to the U.S.A...... .
http://www.abovetopsecret.com/forum/thread267691/pg1
Having just returned from a week in Puerto Vallarta one day ago, this is very disturbing news.
Simple.
Poor hygiene and sanitation on the part of the general population, a dense population per square mile in places like Mexico City, lack of adequate advanced health care, lack of vaccines, lots of interior rot and confusion within the government that does not engender swift and unpopular action, gang wars that hinder the government to act even if it wanted to, direct and easy access to the US, popular tourist destination that allows ease of spreading the disease.
Mobile community. Mexico City has a large test population, and no law or Gov. to speak of. Large numbers travel at will in and out of U.S. undetected.