Question

Diseases are broadly grouped into infectious and non-infectious diseases. In the list given below, identify the infectious diseases.
(i) Cancer (ii) Influenza
(iii) Allergy (iv) Small pox

• A. (i) and (ii)
• B. (ii) and (iii)
• C. (iii) and (iv)
• D. (ii) and (iv)

Answer 1

The correct option is D (ii) and (iv)

A disease is a condition that deteriorates the normal functioning of the cells, tissues, and organs. They are of two types:

1. Infectious disease is caused by an infectious agent (microorganism) that impairs/diseases a healthy person. They can be spread from person to person, either directly (skin contact) or indirectly (contaminated food or water). For example, influenza and smallpox.
2. A disease that is non-contagious (which cannot be transmitted) is called a non-infectious disease. These diseases are not caused by pathogens. Rather they are likely to be caused by lifestyle factors, environmental toxins, or gene mutations. For example, cancer and allergy.