This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Rubella virus was isolated in- 
Select and explain. 
A. 1862, B. 1912, C. 1932, D. 1962
D: 1962
Answer: D: 1962 
Explanation: Rubella virus was isolated in 1962. In 1967, an attenuated vaccine was developed. Ref:PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page: 150