The Graph Below Shows That After the Childhood Vaccination Program

question 30

Multiple Choice

The graph below shows that after the childhood vaccination program was initiated in the United Kingdom in 1999,the annual number of meningitis cases in children

• A) decreased to nearly zero by 2004,as did the meningitis rate for adults.
• B) increased to over 700 in 1999 before slowly decreasing in 2000,as did the meningitis rate for adults.
• C) did not decrease or increase; there was also no change in the meningitis rate for adults.
• D) decreased to zero by 2000,as did the meningitis rate for adults.

---

Definitions:

Reading

The process of interpreting written symbols and comprehending them as words or sentences.

Polarization

The process where opinions, attitudes, or behaviors become more extreme, often as a result of group dynamics.

Neuron

An exclusive cell type that communicates through nerve impulses; identified as a neuron.

Absolute Refractory Period

A time period immediately following an action potential during which a neuron is incapable of firing a second action potential, no matter the strength of the stimulation.