Which of the following is a characteristic of antibodies?

Identify the statement that is $\text{NOT}$ correct.

Some people who have suffered from a disease may not be affected again during their lifetime; such immunity is called

Which of the following statements is correct regarding immunity?

$A$ substance (low molecular weight protein) produced by host cells in response to viral infection that protects other cells against further viral infection is:

Assertion $A$: Cell-mediated immunity is responsible for the rejection of organ transplants. Reason $R$: The body's immune system has the ability to differentiate between self and non-self. Which option is correct for Assertion $A$ and Reason $R$?