Interferons are:

Lymph nodes are responsible for fighting against which of the following?

Give scientific reasons: Autoimmune diseases are different from immune deficiency diseases.

Small proteins produced by vertebrate cells in response to viral infection,which inhibit further viral multiplication,are known as.............

Given below are two statements:
Statement $I$: Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.
Statement $II$: Both bone marrow and thymus provide micro-environments for the development and maturation of $T$-lymphocytes.
In the light of the above statements,choose the most appropriate answer from the options given below:

When ready-made antibodies are directly given to protect the body against foreign agents,it is called . . . . . . .