Morning all - my (adult) son is due to go to the Congo in January - he's skyped me to ask if he was vaccinated against measles and had the polio vaccine as he child. He did and I offered to scan a copy of the record card to him. He then said not to worry he would sort it - he just wanted to know. That got me thinking...as he was fully vaccinated as a child, are there any problems with having them done again? Anyone any ideas? Thank you.