Where is the antivenom for snake bites produced?

The percentage of the population suffering from mild mental disorders is: (in $\%$)

The treatment of these diseases has become possible due to antibiotics.

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 first dose of $BCG$ vaccine is given at the time of:

Small solid structures located at various points in the lymphatic system are known as: