Anti-Smoking on Stamps: A Topical site on a major world issue
Atlas of Ophthalmic Philately: A beautiful site on stamps related to eye donation, braille, ophthalmology congresses and eye diseases, famous ophthalmologists & blind people,
Dentistry and stamps - Thématique Dentaire: How dentistry is seen through stamps.
Malaria on Stamps Collection: Displays philatelic material that publicized efforts to eradicate mosquito-bourne illness.
Radiology on Stamps: A Philatelic History of Radiology