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A sexually transmitted infection (STI), sexually transmitted disease (STD) or venereal disease (VD) is a category of diseases and infections...

Syphilis is a well-known sexually transmitted infection. It is primarily transmitted through sexual contact, although it may also be tra...

Human papillomavirus (HPV) is a virus of the papillomavirus type. HPVs infect only the keratinocytes of the skin or mucous membranes. Most...

Human immunodeficiency virus (HIV) is a lentivirus – a type of retrovirus – and is the cause of acquired immunodeficiency syndrome (AIDS...

Herpes simplex is a viral disease caused by Herpes simplex type 1 (HSV-1) and type 2 (HSV-2). Herpes infections are categorised into one...

Crab louse, or pubic louse - commonly referred to as "crabs" - are a parasitic insect exclusive to humans, that feed exclusively o...

Thrush (candidiasis) - commonly referred to as a yeast infection - is a fungal infection of any of a number of species of yeasts (candida). ...