Final answer:
A contagious respiratory illness that causes mild to severe illness and even death
Step-by-step explanation:
The subject of this question is a contagious respiratory illness. It can cause mild to severe illness and even death. Some examples of contagious respiratory illnesses are SARS, MERS, measles, rubella, chickenpox, influenza, and pneumonia.
Learn more about Contagious Respiratory Illness