As swine flu or Mexican flu is on the rise in Thailand, I had this question. They say flu is most likely to spread in rainy or cold season, but that is not the case in Thailand. Why is it spreading so rapidly now?
Also, is everybody wearing masks there now?

Before swine flu, there was still flu that people catch during flu season. Does anybody know the official name of the flu that people got every flu season?
And what makes swine flu so different?