Which of the Following Statements Regarding Vaccines as Disease Preventatives

question 1

Multiple Choice

Which of the following statements regarding vaccines as disease preventatives is incorrect?

• A)Zostavax is recommended for older adults to prevent shingles.
• B)The Carter Center has promoted the development of a vaccine against river blindness.
• C)There is currently no smallpox vaccine available to the general public.
• D)Immunization is currently not possible against Clostridium perfringens.

---

Definitions:

Abstract Methods

Abstract methods are methods in Java that are declared without an implementation in an abstract class, and must be implemented by subclasses.

Downcasting

The process of converting a reference of a parent class to a reference of a child class in the object hierarchy.

Ancestor Class

A class from which another class is derived, either directly or through one or more levels of inheritance.

Descendent Class

A class in object-oriented programming that inherits properties and methods from one or more base classes, also known as a subclass.