STIs can be bacterial, such as chlamydia, gonorrhea, and syphilis, or viral, including herpes, HIV, and HPV. Transmission may involve body fluids (blood, saliva, semen, vaginal secretions) or direct ...

Syphilis and hepatitis C are two such examples ... many of which are different from the HHS list. Within this context, the definition can often bend to fit the situation. With the HHS, "chronic" is ...

Formication, or parasitosis, is the sensation of having insects crawling on or under the skin. Formication is a tactile hallucination, which means a person feels a physical sensation without a ...