Which statement is true about noninfectious diseases?

Which statement is true about noninfectious diseases?

• A. They cannot spread from person to person.
• B. They are always caused by viruses.
• C. They are cured with vaccines.
• D. They are contagious.

Answer: (A)

Noninfectious diseases are conditions not caused by germs such as bacteria or viruses, and they cannot be passed from one person to another. Because there is no infectious agent involved, these diseases are not contagious and you can't catch them from another person by ordinary contact. They can stem from genetic factors, lifestyle choices, or environmental exposures, and many develop over time rather than from an infection. Vaccines are designed to prevent infections caused by pathogens, not to cure noninfectious diseases, which is why contagiousness is not a feature of these conditions.

Noninfectious diseases are conditions not caused by germs such as bacteria or viruses, and they cannot be passed from one person to another. Because there is no infectious agent involved, these diseases are not contagious and you can't catch them from another person by ordinary contact. They can stem from genetic factors, lifestyle choices, or environmental exposures, and many develop over time rather than from an infection. Vaccines are designed to prevent infections caused by pathogens, not to cure noninfectious diseases, which is why contagiousness is not a feature of these conditions.