The virus causing conjunctivitis spreads from one person to another through the air. Therefore,conjunctivitis is a:

Select the correct option to fill up the blanks.
$(i)$ Diseases which are easily transmitted from one person to another,are called $.....$ diseases.
$(ii)$ In human body,parasite of malaria initially multiplies within the $........$ and then attack the $......$
$(iii) ......$ is the yellowish fluid secreted by mother during the initial days of lactation.
$(iv) ......$ and $.......$ are the primary lymphoid organs.

The diseases which occur at irregular intervals and locations are known as

The spleen is a:

$NFCP$ stands for

Diseases present from birth are called . . . . . . .