I can be invisible and damage your health : I'm a sexually transmitted infection : see to it : sexual health (GUM) services in and around London / CHAPS, Community HIV and AIDS Prevention Strategy.

Licence: In copyright

Credit: I can be invisible and damage your health : I'm a sexually transmitted infection : see to it : sexual health (GUM) services in and around London / CHAPS, Community HIV and AIDS Prevention Strategy. Source: Wellcome Collection.