Learn how to say Contagion correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word contagion:
the transmission of disease from one person to another by direct or indirect contact
a contagious disease
another name for contagium
a corrupting or harmful influence that tends to spread; pollutant
the spreading of an emotional or mental state among a number of people ⇒ the contagion of mirth
C14: from Latin contāgiō a touching, infection, from contingere; see contact