Choose the odd one out and write the category for the remaining terms:

(a) Cholera, Typhoid, Malaria, Tuberculosis

(b) Hepatitis, Ascariasis, Chicken pox, Poliomyelitis

(c) Elephantiasis, Ascariasis, Taeniasis, Hepatitis

(d) Depression, Beri-beri, Scurvy, Night-blindness

(e) Malaria, Amoebiasis, Sleeping sickness, Cataract

Define:

(a) Infection

(b) Pathogen

(c) Incubation

(d) Disease

(e) Vaccine

Name the causative germ of AIDS. How is this disease transmitted?

Write very briefly about the following:

BCG