Discussion
Which of the following represents a set of communicable diseases ?
Answer: A
The set of communicable diseases is tuberculosis, cholera, measles.
Communicable diseases are caused by microbes and spread from person to person: tuberculosis (a bacterium, through the air), cholera (a bacterium, through contaminated water and food) and measles (a virus, through the air).
Each other set includes a non-communicable disease: hypertension, asthma and cancer do not spread from one person to another. Common cold, common flu and chickenpox are communicable, but a set containing even one non-communicable disease is not a set of communicable diseases.
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