A child may be given the vaccine for chickenpox. If the child goes to school and plays with other children who have the chickenpox virus, the vaccinated child will not get sick. Why is this?

Question

Quizplus · Accepted Answer

Vaccines produce a primary immune response that generates memory cells. These memory cells recognize and respond rapidly to the same pathogen in a secondary exposure, preventing the vaccinated child from becoming sick when exposed to the chickenpox virus. Vaccines do not act like antibiotics, introduce friendly viruses into cells, or stimulate macrophages to work extra hard.

A Child May Be Given the Vaccine for Chickenpox