H1N1 Flu Virus (Swine Flu) Symptoms and Treatment || Health Tips
2016-03-09 8 Dailymotion
H1N1 flu is also known as swine flu. It's called swine flu because in the past, the people who caught it had direct contact with pigs. That changed several years ago, when a new virus emerged that spread among people who hadn't been near pigs.