Which of the Following Statements Are True of Vaccines

question 47

Multiple Choice

Which of the following statements are true of vaccines?

• A) Vaccines are effective for all known communicable diseases.
• B) Vaccines can produce disease similar to the one it is intended to prevent in those with reduced immunity.
• C) Vaccines are especially effective for the very young and the elderly.
• D) Vaccines are more than 95% effective.

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Definitions:

Dependent Variables

Variables in an experiment or model that are expected to change in response to changes in the independent variables.

Stepwise Regression

A method of fitting regression models in which the choice of predictive variables is carried out by an automatic procedure, adding or removing variables based solely on statistical criteria.

Stepwise Regression

A regression analysis technique where an automatic process is used to select the predictive variables.

Preliminary Tool

An initial instrument or technique used in the early stages of research to help gather data, assess theories, or guide a study's direction.