‘Pathogens' are
Substances produced against any disease causative
Chemical substances produced by the host cells to kill the parasite animal
Disease spreading factors
Cells which kill the parasites
What are interferons ? How do interferons check infection of new cells ?
Where are $B\,-$ cells and $T\,-$ cells formed ? How do they differ from each other ?
Select the incorrect statement with respect to acquired immunity.
Which is an auto immune disease
Give scientific reasons : Autoimmune diseases are different from immune deficiency diseases.