Which comparisons of Trial A (no immunity) and
Trial C (50% immunity) did you include in your
explanation? Check all that apply.
After six points of contact, fewer people were
infected in Trial C than in Trial A.
On average, the slope of the graph for Trial C
was less than than the slope for Trial A.
Infection spread at a slower rate in Trial C than
in Trial A.
In addition to the ten immune people, three
nonimmune people did not become infected.
Help

1.

3.

4.

Explanation:

In trial A, people have no immunity so there are more chances of infection and in trial C, only 50% of people have immunity so chances of infection are less, so infection will spread faster in trial A than trial C.

If compared, trial C will have less infected people than trial A because people in trial A has no immunity and people in trial C have 50% of immunity, so only fewer people will get infected even after six point of contact.

As percentage of immune people (trial C) is 50, so there are equal chances of immunity and non-immunity. there are three reasons of infection that include source, susceptible person and transmission. source and susceptible person can be the reason of infection in some non-immune people but the transmission reason can vary. so, there is probability that three nonimmune people lie under transmission reason and are not coming in contact with infected  people, medical equipment or environment, that causes infection and those three people are not getting infected.

Hence, the correct options are 1, 3 and 4.

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