Only certain sexually transmitted diseases (STDs) are transmittable through kissing. Two common ones are herpes simplex virus (HSV) and cytomegalovirus (CMV).

Kissing can be one of the most exciting parts of a relationship. But you may also feel wary of kissing if you’re with someone for the first time.

The best way to avoid getting an STD from kissing is to have a direct, transparent conversation about it with your partner. This can be intimidating, but setting boundaries early can help you avoid infection.

Source
https://www.healthline.com/health/sexually-transmitted-diseases/std-from-kissing