Where were the first cases of the swine flu Novel H1N1 in Mexico and in the US?

The illness is believed to have begun in La Gloria, a small town in southern Mexico, although it may have actually been a "silent epidemic" circulating unknown in Mexico from as far back as January 2008.

The first confirmed and reported case was in Mexico City and was made public March 18, 2009. But it is thought that for at least several months prior to that, this strain of the H1N1 flu was infecting people in and around La Gloria, a village of about 3,000 people, and it is likely that the first human case may be able to be traced back to a young boy named Edgar Hernandez from La Gloria. He survived the virus.

Also, although a particular pig farm in Mexico was thought to have perhaps had the first case of the flu among pigs, the Mexican government tested and found no evidence of that at the farm. It is now believed that the first case among pigs was more likely at a different farm in Texas.

The first cases in the US were discovered very soon after the Mexican cases, with two children in Southern California. The first was discovered on April 14, 2009 in a child in San Diego County in California and another child a few days later in a town not far from the first was also reported. The next cases in the US began in Texas and became more and more widespread there as the sporadic outbreaks began and gradually spread.