The following are some well-known abbreviations,which have been used in this chapter. Expand each one to its full form:
$(a)$ $MALT$
$(b)$ $CMI$
$(c)$ $AIDS$
$(d)$ $NACO$
$(e)$ $HIV$

World $AIDS$ Day and World Earth Day are celebrated on . . . . . . and . . . . . . respectively.

Choose the wrong statement regarding $AIDS$.

In which state of India was the first case of $AIDS$ infection reported?

Identify the correct sequence for the mechanism of $HIV$ infection:
$1.$ Viral $RNA$ replicates to form viral $DNA$ with the help of reverse transcriptase.
$2.$ The progeny viruses released in the blood attack other $T_H$ cells and destroy them.
$3.$ Viral $DNA$ gets incorporated into the host cell's $DNA$ and produces virus particles.
$4.$ Virus enters into macrophages.

$AIDS$ is caused by the reduction of: