Antibodies are produced by

Recognition and digestion by the phagocytes due to the coated surface of antigens by the antibodies is known as

Which of the following acts as a physical barrier to prevent the entry of microorganisms into our body?

The lymphoid tissue associated with the mucosa is known as .........

$A$ boy happens to put his foot on a rusted nail and the doctor gives him an injection. Most likely,what has the doctor administered?

Assertion: Interferons are effective against viruses.
Reason: Proteins which can be synthesized only by genetic engineering are effective against viruses.