The process of transfer of cell mediated immunity from one individual to other is
**Core Concept**
Cell-mediated immunity (CMI) is a type of immune response that involves the activation of immune cells, such as T-lymphocytes, to recognize and eliminate pathogens. The transfer of CMI from one individual to another is a complex process that involves the exchange of immune cells and their products.
**Why the Correct Answer is Right**
The correct answer is **Passive Immunity**. Passive immunity occurs when a person receives pre-formed antibodies from an external source, such as mother's milk, blood transfusion, or immunoglobulin injections. This type of immunity provides immediate protection against infections but is short-lived. In the context of cell-mediated immunity, passive immunity can be achieved through the transfer of immune cells, such as T-lymphocytes, which can recognize and eliminate pathogens in the recipient.
**Why Each Wrong Option is Incorrect**
**Option A:** Active Immunity - This type of immunity occurs when a person's immune system produces antibodies in response to an infection or vaccination. It is not related to the transfer of immunity from one individual to another.
**Option B:** Immunoglobulins - Immunoglobulins are antibodies that provide passive immunity. However, they do not transfer cell-mediated immunity.
**Option C:** Adoptive Immunity - Adoptive immunity is a type of active immunity that occurs when a person receives immune cells from another individual. This process involves the activation of the recipient's immune cells, making it a form of active immunity.
**Clinical Pearl / High-Yield Fact**
When considering the transfer of cell-mediated immunity, it is essential to understand the difference between passive and active immunity. Passive immunity provides immediate protection but is short-lived, whereas active immunity takes time to develop but provides long-lasting protection.
**Correct Answer: D. Adoptive Immunotherapy**