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Question
It was diagnosed that the body of a patient has lost its power of fighting any infection. Name the disease he is suffering from. What type of microbe is responsible for this disease and how does it spread from one person to the other.
Solution
He is suffering from AIDS (acquired immunodeficiency syndrome). The microbe that is responsible for the disease is the retrovirus human immunodeficiency virus (HIV).
It spreads from one person to another by the following ways:
(a) Unprotected sexual contact with the infected person
(b) Transfusion of blood contaminated by HIV
(c) Use of injected needles or unsterilised needles
(d) From an infected mother to her child during pregnancy
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