The occurrence of sexually transmitted disease varies with the microorganism. Much data collection has taken place to explore these trends. For example, viral hepatitis can transmit via contact with blood and body fluids. For hepatitis A and B, postexposure prophylaxis measures are available, but this is not the case for hepatitis C. Effective vaccines for hepatitis A and B are beneficial to prevent the illness in nearly anyone, but there is not an effective method for hepatitis C .
Sexual transmission of hepatitis A and B is well-known, but many physicians have said for years that hepatitis C does not spread via sex. Hepatitis C transmits mainly by injecting drug use; however, in recent years, physicians have acknowledged sexual transmission of hepatitis C especially in men who have sex with men. This is especially true in men who have unprotected anal sex with multiple partners.
Hepatitis C virus can also spread via transfusion of blood or blood products which have not undergone adequate screening. Moreover, reuse of medical equipment without sterilization can transmit hepatitis C .