You need to think about that before you have sex, because after having sex, it's too late. And that's just teenagers. Looking at the entire population, there are about 50,000 people each day in our country who contract a sexually transmitted disease. That happens in big cities, but not where I live. In the 1950s there were only five sexually transmitted diseases that were known and treated.
Today there are more than fifty types of STDs.
Chlamydia is the number one STD among teens today. There are about 4,000 teenagers every day who contract chlamydia. This is a bacteria, not a virus. Unlike some venereal diseases, it can be cured. But more than 80 percent of the students who contract this disease do not realize they have it.