Which of the following diseases is caused by a virus?
A
Typhoid
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B
Cholera
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C
Influenza
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D
Diphtheria
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Solution
The correct option is C Influenza Influenza (also known as the flu) is a contagious respiratory illness caused by influenza virus. Typhoid fever is an acute illness associated with fever caused by the Salmonella typhi bacteria. Cholera is an infectious disease that causes severe watery diarrhoea, caused by bacterium called Vibrio cholerae. Diphtheria is caused by the Corynebacterium diphtheriae bacterium.