When our body encounters first time with a pathogen. Then the first time low intensity response is known as :-

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the body's initial response when it first encounters a pathogen.

2. **Identifying the Type of Response**: The first response that the immune system generates upon the first encounter with a pathogen is referred to as the "primary response."

3. **Immune System Involvement**: During the primary response, specific immune cells are activated. These include B cells and T cells, which play crucial roles in the immune response.

4. **Antibody Production**: The primary response is characterized by the production of antibodies. The first type of antibody that is produced in response to a new pathogen is Immunoglobulin M (IgM), followed by Immunoglobulin G (IgG) in subsequent responses.

5. **Comparison with Secondary Response**: If the same pathogen invades the body again, the immune system mounts a faster and stronger response known as the "secondary response," which involves memory cells that were created during the primary response.

6. **Final Answer**: Therefore, the first time low-intensity response to a pathogen is known as the "primary response."

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