According to the NCERT text, common Sexually Transmitted Infections (STIs) include Gonorrhoea, Syphilis, Genital herpes, Chlamydiasis, Genital warts, Trichomoniasis, Hepatitis-B, and HIV leading to AIDS. Encephalitis (inflammation of the brain) is not listed as a sexually transmitted disease; it is commonly caused by viral infections transmitted via vectors like mosquitoes (e.g., Japanese Encephalitis) or other non-sexual routes .