When me and my FI went to our DR we discovered that I already had my Hep B vacination (from gr. 7) so I only need to be vacinated for Hep A. My FI needed both A & B so he was given the Twinrix shot. My DR also suggested that we take Dukarol for diarrhea - good advice! Another interesting thing my DR told us was to stay away from needles, tattoos and piercing. Needles can contain Hep C and we are not vaccinated for Hep C. He convinced us to pass on the legal ceremony in Mexico and legally get married in Canada. Even though I'm sure the blood tests are safe, I do not want to take the chance.