Immunosuppressive therapy is employed during ………..

Explanation

**Step-by-Step Solution:**

1. **Understanding Immunosuppressive Therapy**: Immunosuppressive therapy refers to the use of drugs or treatments that suppress or reduce the strength of the body's immune system. This is crucial in situations where the immune system might attack foreign tissues.

2. **Application in Organ Transplants**: One of the primary applications of immunosuppressive therapy is during organ transplants. When a patient receives an organ from a donor (like a kidney), the recipient's immune system may recognize the new organ as foreign and attempt to reject it.

3. **Mechanism of Action**: To prevent this rejection, immunosuppressive drugs are administered. These drugs lower the immune response, allowing the transplanted organ to be accepted by the body without being attacked by immune cells such as macrophages.

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