(i) Expand the abbreviation AIDS. Name its causative organism.
(ii) Why AIDS is considered a syndrome and not merely a disease ? Comment.
(iii) List atleast three ways in which AIDS can be transmitted from an infected person to another.

Explanation

(i) AIDS-Acquired Immuno Deficiency Syndrome , It is caused by retrovirus-HIV (Human Immuno virus).
(ii) Use of contaminated needles and syringes to inject drugs or vaccines.
Use of contaminated razors for shaving.
Transfusion of infected blood or blood products.