Step 1: Example of STD.
One common sexually transmitted disease is **AIDS (Acquired Immuno Deficiency Syndrome)** caused by HIV (Human Immunodeficiency Virus).
Step 2: Control measures.
- Avoid unprotected sexual contact (use condoms).
- Ensure use of sterilized needles and avoid sharing syringes.
- Screen blood before transfusion.
- Create awareness through sex education.
- Infected individuals should receive proper medical treatment and counselling.
Final Answer: \[ \boxed{\text{Example: AIDS. Control – safe sex, sterilized needles, screened blood, awareness.}} \]