Respuesta :
Answer:
The correct answer is- 1. They all involve a fragile infectious agent
Explanation:
Sexually transmitted disease is the disease which is mainly caused by sexual contact with an infected person. The sexually transmitted disease can be caused by fragile infectious agents like bacteria, viruses, and protozoa.
Sexually transmitted diseases caused by protozoa are more easily treated than bacteria and viral sexually transmitted diseases.
The sexually transmitted infection which is caused by the virus is more fatal than infection caused by a other pathogen for example AIDS is caused by the HIV which has a high mortality rate.
