Questions and Best Answers



  A carrier is an infected person or animal that harbours a specific infectious agent in absence of discernible clinical disease and serves as a potential source of infection for others.

⇒ In carrier stage, the sign, symptoms of disease is not present.

⇒ The infectious agent may not be present in secretions. So, drugs are not useful sometimes.

  So, carrier stage of a disease is not amenable to control.