Which immunoglobulin is present in abundant amounts in the mother's initial milk secretion (colostrum)?

$A$: Live attenuated vaccine is better in terms of immunity provided to the recipient.
$R$: As secondary lymphoid organs,example $Peyer's$ patches are stimulated to protect the individual.

An antibody molecule is represented as:

$T$-Lymphocytes originate from

Interferons are produced in response to

$MALT$ constitutes about what percentage of the lymphoid tissue in the human body (in $, \%$)?