December 2009 LSAT - Section 1 - Question 11
Ravi October 1, 2020
@CMarr, (E) is incorrect because it strengthens the argument. It shows that permanent immunity developed in an analogous situation. (A) is correct because it serves to weaken the argument by showing that the method described (which is mimicking the disease in a certain way) is not likely to produce permanent immunity. If it were likely to produce permanent immunity, then these people who were exposed to hepatitis E should not have later gotten it.