Where is the antivenom for snake bites produced?

$A$: $ELISA$ is based on the principle of antigen-antibody interaction.
$B$: In $ELISA$,infection by a pathogen can be detected by the presence of antigens or by detecting the antibodies synthesized against the pathogen.

The first triple antigen vaccination ($DPT$ vaccine) is given to a child at the age of:

The main barrier which prevents the entry of disease-causing organisms into our body is

$VCRC$ stands for:

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