What are some of the dangers of these "travel vaccines"?To answer the thread question: what vaccines to give to a child or even an adult?
Absolutely none. Zero. My grandparents generation none of them vaccinated yet lived longer and in great health.
Even as an adult you should avoid all vaccines. The travel ones are useless and have nasty side effects that creep up on you . If you are a female then I pray you avoid pure toxins like Gardasil that can literally paralyze you.
I have always been moderately anti-vax (I had a couple that were required for school but stopped by college, even though they claimed one was required, no one ever asked me for proof). But I have willingly taken the African ones like yellow fever. Africa is a rather dangerous place. A couple of friends were in the peace corps there and told stories of these parasites that lived in the lakes right by their house that could swim inside your body and kill you if you ingested any water while swimming.
It's such a wild, natural place that I figured the risk of the crappy vaccine was worth it. Plus they are good for at least a decade. I'm much more suspicious of the ones like the flu that they want you to take every year.