A friend of mine lost the vaccination information for one of his children (a 15 yo boy) and has doubts about the date for the next shot against tetanus (which in France comes together with the ones against diphtheria and tuberculosis polio).
Are there vaccines which specifically must not be taken too often, say after 5 years instead of 10 years?
Note: I am sure that this is obvious but just in case: he is not trying to understand if the vaccine is useful (it is) or whether he should continue administrating it to himself and his kids (he will) - the exact question is about known warnings on some vaccines when they are re-taken too early (we are talking about a magnitude of years (say, now +/- 3 years), not whether to take another one after a week or so)