The Health Protection Authority has issued advice on the vaccinations available to help protect people who may be at risk from some infectious diseases.
Americans are being strongly warned about the risk of measles if they travel to the UK for the Olympic Games, a full news report focussing on the very real risks can be found here.
These concerns and risks are just as relevant to UK nationals as they are to people travelling here from other countries.
The MMR vaccine is available at The Travel Clinic.