Solution

STI stands for Sexually Transmitted Infections or veneral diseases (VD) or reproductive tract infections (RTI). These are infectious diseases which occur and spread under the following conditions: (a) A person is involved in unsafe sex. (b) A person has multiple sex partners. (c) An infected person is involved in sex with a healthy person. Common diseases under STIs are caused by viruses like AIDS, genital warts and bacterial disease like Gonorrhea and syphilis. • Methods for prevention of STDs: (a) Spreading awareness through education and media. (b) People should be advised not to have multiple sex partners. (c) Whenever having sex proper safeguards like condoms should be used