Q. Consider the following diseases:
  1. Hepatitis-A
  2. Tuberculosis
  3. Poliomyelitis
Which of the above are viral diseases?

Answer: Only 1 and 3
Notes: Hepatitis-A is caused by the Hepatitis A virus, and Poliomyelitis is caused by the poliovirus—both are viral diseases. Tuberculosis, however, is caused by the bacterium Mycobacterium tuberculosis and not by a virus. Therefore, only Hepatitis-A and Poliomyelitis are viral diseases.
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