CBSE Class 12-science Answered

Diseases or infections which are transmitted through sexual intercourse with infected persons are called sexually transmitted diseases or STDs.

Gonorrhoea caused by Neisseria gonorrhoeae (bacteria) and Hepatitis B caused by Hepatitis B virus are examples of sexually transmitted diseases.

STDs can be prevented by following some simple practices:

(i) Avoid sexual contact with HIV-infected people.

(ii) Avoid using syringes, needles, razors and toothbrushes used by AIDS patients.

(iii) Blood should be tested properly for HIV before blood donation.

(iv) Breastfeeding should be avoided by an HIV-infected mother.

(v) Addiction of drugs should be avoided.