$A$ person has lost his power to fight infections. Name the disease the person is suffering from. State the pathogen and modes of transmission of this disease.

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(N/A) The person is suffering from $AIDS$ (Acquired Immuno Deficiency Syndrome).
The pathogen responsible for this disease is a virus known as $HIV$ (Human Immunodeficiency Virus).
The modes of transmission of $HIV$ are:
$(i)$ Unprotected intimate sexual contact with an infected person.
$(ii)$ Transfusion of contaminated blood or blood products.
$(iii)$ Sharing of contaminated needles,syringes,or razors used by an infected person.

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