Many vaccines create immunity

Answer choices

1. A

   Correct78% picked this

   Most of the people who contract hepatitis E are young adults who were probably exposed to the

   Why this is right

   This answer is tough to love at first, because it's not explaining to us why the vaccine would fail to create a permanent immunity, but it definitely serves as evidence against the notion of permanent immunity. All vaccines do is expose us to a virus, safely, so that we can make antibodies that will supposedly protect us later. If most of the people getting hepatitis E had previous exposure to the virus but still ended up getting it, then what help would the hepatitis E vaccine have been? If their bodies didn't create permanent immunity antibodies from being exposed to the disease during childhood, then why would we think that the hepatitis E vaccine would be any more successful in prompting their bodies to create permanent immunity antibodies?

   Skill tested: Weaken · how this choice captures the argument's function is the move to repeat next time.

   78%
2. B

   Too Weak / Opposite5% picked this

   Some laboratory animals exposed to one strain of the hepatitis virus developed immunity to all

   It would be very unusual for the correct answer to be as weak as "some". But this one even seems to go in the wrong direction, since it sounds like no matter what strain of hepatitis E the vaccine contains, it may have the promise to inoculate us against all strains of it.

   5%
3. C

   Opposite3% picked this

   Researchers developed a successful vaccine for another strain of hepatitis, hepatitis B, after first isolating the

   This strengthens the author's claim by providing a relevantly similar example in which something similar to her claim occurred.

   3%
4. D

   Irrelevant Distinction8% picked this

   The virus that causes hepatitis E is very common in some areas, so the number of people exposed to that virus is likely to

   This doesn't affect our impression of the vaccine at all. It's just saying a pretty self-justifying truism that "in areas where the virus is very common, the number of people exposed to the virus is likely to be high".

   8%
5. E

   Opposite6% picked this

   Many children who are exposed to viruses that cause childhood diseases such as chicken pox

   This strengthens the idea that early exposure leads to immunity later.

   6%