00:01
So we're looking at the graph, and we see a primary response to the antigen to make antibody a.
00:07
Graph kind of looks like this.
00:09
And then we see a secondary response upon second exposure.
00:13
And then we also see a first exposure to antibody b.
00:16
That's our primary response.
00:17
So the question says, if you are using the patterns information presented, if you expose the individual to antigen c on day 54, what are you likely to see? now, exposure happened about six days before we see the primary antibody response.
00:35
So when we look at our choices, we can cross off a and b because this says primary exposing the antigen to, suppose the person to antigen c, which they've never gotten before.
00:48
So these high numbers, this is 10 to the third antibodies and 10 to the fourth.
00:53
We only see those on secondary exposure, so we can cross those off...