Why do immunizations require two doses?
A)The first dose stimulates the effector cells only, and the second dose stimulates the memory cells only.
B)The first dose stimulates the primary immune response, and the second dose stimulates the secondary immune response.
C)In case the first dose isn't enough to induce immunity, a second dose is given.
D)The first dose often is ineffective.
E)The first dose stimulates the innate immune response, and the second dose stimulates the adaptive immune response.

Question

Quizplus · Accepted Answer

The first dose of a vaccine typically stimulates the primary immune response, which helps the body recognize the pathogen. The second dose boosts the immune system by stimulating the secondary immune response, enhancing the production of memory cells and antibodies for long-term protection.

Why Do Immunizations Require Two Doses