In $T$-lymphocytes,what does the letter '$T$' stand for?

The immunity developed by the body to combat diseases during its lifetime after birth is known as:

When a host is exposed to antigens,which lead to the production of antibodies in the host body,this type of immunity is called:

Select the option that correctly matches the example with its specific type of immunity barrier.

Which of the following are the most abundant types of antibodies?

Lymphocytes are sensitive to .........