@Rick *********
You can wait till you are on US Medicare. Vaccines are free, at that point (in the US). Hepatitis vax is a good idea. I thought HepA was all I needed, since I'm not in the "B" lifestyle. A doc asked me, "What if you need a tranfusion, after an accident?" 🤔 A point well taken. Got the HepAB combination vax series...just to be safe. Doesn't hurt, and free when you're a US geezer. Once you're over there, or back in the US, consider getting checked for parasites (roundworms, hookworms, etc). We worked refugee clinics up on the Thai-Myanmar border, and ALL the patients we saw were treated for parasites. Easy treatment (one pill), but extremely common. Don't let that stop you from going though. :-)