During a health assessment, you receive a lab report for a 65-year-old male patient presenting with fatigue and fever. His complete blood count (CBC) shows a count of immune defense cells at 15.0 x 109/L. Based on the typical reference interval of 4.0-11.0 x 109/L for these cells, how should the results be assessed?
The patient's immune cell count is within expected parameters; no further analysis is required.
This measurement falls below the normal range, raising concerns for immunodeficiency disorders.
Such an elevation in the count is indicative of immediate risk for severe allergic reaction.
The count indicates a possible immune response to an infection or another underlying issue and should be investigated further.