Question

Complete the hypothesis below to answer the lab question, “What is the effect of immunity on the rate at which a disease spreads?” Hypothesis: If a higher percentage of people are immune to a disease, then . . . because . . .

Answer 1

If a higher percentage of people are immune to a disease, then the disease will spread more slowly, because fewer people will be able to contract it or pass it on.

Answer 2

The immune system is a biological system in an organism consisting of a coordinated set of elements of recognition and defence that discriminates against the self of non-self. To resume, the immune system protects us against infection from bacteria, viruses, fungi, or parasites.

Back to the hypothesis: If a higher percentage of people are immune to a disease, then the rate at which a disease spreads is lower because the immunized people carry fewer infections so it cannot be spread between people.