I got it last year, and now I'm getting this years combo Flu/HIN1 shot on Saturday. Go to the Abu Hamour Vaccination Center behind the Abu Hamour Petrol Station. Bring your passport and your vaccination record (if you have one). If you do not have a vaccination record they will charge you 10QR. Otherwise it's free! It's not required, but one little shot is better than being sick for a month.