My friends daughter refuses to have her children vaccinated, says it will make them stupid . I guess she got one too many.
One thing that concerns me (but has not affected me in my 5 trips to cancun) is mosquitos. Dengue fever. Not for me. I spray myself at the first mosquito sighting
Just an FYI, the cost for Twinrix in Alberta is much more than $30. I think you're looking at more like $175 (for all 3).
Never had any vaccinations any of the time we have gone. We've never gotten sick. Not even traveler's stomach issues. We do not get the regular flu shot or anything. Just have the regular vaccinations you get as a kid.