Monitoring your white blood cell (WBC) count is vital for detecting infections or immune system issues. A Complete Blood Count (CBC) test is the most common and simple method. This test measures different blood components, including WBCs, and requires only a small blood sample. It can be ordered by your doctor and analyzed quickly. If you are taking antibiotics like cephalexin capsules, it’s important to monitor your WBC count, as some medications may affect it. Always follow up with your healthcare provider for accurate interpretation and further steps if your results fall outside the normal range.