Final answer:
A high number of white blood cells and immature white blood cells in response to an infection suggests a healthy immune response, as the immune system is actively fighting off the pathogens. The production of WBCs including granulocytes and monocytes is part of the body's innate immune system to protect against bacteria, viruses, and other invaders.
Step-by-step explanation:
The presence of a high number of white blood cells (WBCs) and immature white blood cells to combat an infection typically indicates a healthy immune response. During an infection, the immune system ramps up the production of WBCs to fight off pathogens. This is a form of positive feedback, where more WBCs, including granulocytes and monocytes, are attracted to the site as the number of pathogens in the body increases. These cells defend the body against bacteria, viruses, and other invading organisms.
Abnormally high levels of WBCs can sometimes signify medical conditions such as viral or fungal infections, tuberculosis, or certain chronic diseases. However, in the context of a clear infection, it generally points to a robust immune response. If the WBCs were immature and present in extremely high quantities without a clear cause, such as an infection, it could raise concerns for conditions like leukemia. But in this case, since it is an immune response to an infection, option 'd. Healthy immune response' is correct.