(i) Virus : Common cold, Influenza, AIDS.
(ii) Bacteria : Typhoid, Cholera, Tuberculosis.
(iii) Protozoa : Malaria, Kala-azar.
(i) Virus : Common cold, Influenza, AIDS.
(ii) Bacteria : Typhoid, Cholera, Tuberculosis.
(iii) Protozoa : Malaria, Kala-azar.