Information on the European Health Insurance card (EHIC) and obtaining medical attention abroad.
http://www.dh.gov.uk/PolicyAndGuidance/HealthAdviceForTravellers/fs/en

Provides travel health information covering immunizations, illness prevention, infectious diseases and special needs for infants and children.
http://www.mdtravelhealth.com/

US CDC provides health information for travelers including recommended vaccinations, cruise ship "green sheets" and special needs travel.
http://www.cdc.gov/travel/

Offers professional medical companion and nursing health care services while traveling in Hawaii.
http://www.vacationcareinternational.com/