oh my god! It is so serious?

I had just watched the news and was so shocked that so many countries had been affected.

Where does this virus come from? I heard from friends that it comes from pigs.

But, in medical brochures, it says that it is a piggybacking virus not from the pigs.

And how did this virus develop into such a strong one?

So, I surfed the net and found this.

H1N1 a.k.a swine flu, is a strain from combining the bird flu virus, human flu virus and the pigs virus.

I not sure  of this, it sounds a little bit weird, do pigs have virus?

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