Asked by zikieya

how did the swine flu start
Answered by Ms. Sue
Swine flu was first noticed in pigs in the 1930s. Very occasionally a human who worked with the pigs also got this respiratory disease.

Check this site for more details.

http://www.smh.com.au/world/science/history-of-swine-flu-20090427-ak2y.html
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