57. Consider the following statements:
1. The duration of immunity is longer when live vaccine is administered as compared to the administration of killed vaccine.
2. In the case of killed vaccine, single dose is sufficient whereas multiple doses are always required in the case of live vaccines.
Which of these statements is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
ANS- (a) 1 only