Do they take out blood or use a swab?
Nose swab. Most hospitals are only testing for it if you're in the ER though.
They check your face. If when you sneeze and your nose turns into a snout temporarily then you for sure have the swine flu. But in seriousness, I doubt you have it and even if you do it is no worse than the regular flu(which actually kills more people a year). Don't buy into the media bullshit.
