Ans. 1. STDs are sexually transmitted diseases.
2. STDs spread from an infected person to a healthy person by unprotected sexual contact.
3. Syphilis, Gonorrhoea, AIDS are some common sexually transmitted diseases which affect the health of human being.
4. To protect individuals from these STDs, sex education and preventive measures are necessary.
5. Use of condom protects the individual from STDs.
