Bacterial STDs , such as gonorrhea, syphilis, and chlamydia, are often cured with antibiotics. However, viral STDs , (the four “H's”) such as HIV , HPV (genital warts), herpes, and hepatitis (the only STD that can be prevented with a vaccine), have no cure, but their symptoms can be alleviated with treatment. Apart from this, malarial infections are also widely spreading especially in African countries. Bacterial toxins and mycobacterial infections are emerging as future epidemic diseases. Various treatments like chemotherapy, antimicrobial treatment and gene silencing are used to cure these infections up to some extent.