Adolescents are particularly vulnerable to STIs due to their immature reproductive and immune systems.
Major causes of STDs/STIs are Bacteria, including chlamydia, gonorrhea, and syphilis. Viruses, including HIV/AIDS, herpes simplex virus, human papillomavirus, hepatitis B virus, cytomegalovirus (CMV), and Zika. Parasites, such as trichomonas vaginalis, or insects such as crab lice or scabies mites. Chlamydial infections, the most common in teenagers of all STIs, can affect both men and women. They may cause an abnormal genital discharge, burning with urination, and rectal discharge and bleeding.
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