Which of the following is a causative agent of influenza ?
A) virus B) cholera C ) tuberculosis D) typhoid
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Answer:
virus
Explanation:
Influenza is caused by infection of the respiratory tract with influenza viruses, RNA viruses of the Orthomyxovirus genus. Influenza viruses are classified into 4 types: A, B, C, and D. Only virus types A and B commonly cause illness in humans.
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