Infections of which sexually transmitted disease can be greatly reduced by a vaccination?

The correct answer is Human Papillomavirus Infection (HPV).
HPV is one of the most important sexually transmitted diseases which could cause precancerous wounds that could increase a person's risk for cancer of the cervix, mouth, throat and genital parts. There are more than 170 types of HPV. In the past decade, scientists have developed vaccines which can prevent most of the common types of HPV infection. 

Nucleus is the organelle that contains chromosomes