What were the two most common sexually transmitted disease is in US before 1980?

* Gonorrhea is a bacterial infection that can be spread through vaginal, anal, or oral sex. It can cause symptoms such as burning or pain during urination, discharge from the penis or vagina, and painful or swollen testicles.

* Syphilis is a bacterial infection that can be spread through vaginal, anal, or oral sex. It can cause symptoms such as a sore or ulcer on the genitals, rash, fever, and swollen lymph nodes.