A red blood cell (RBC) count measures how many RBCs you have and is usually part of a complete blood count (CBC). It can help diagnose anemia, erythrocytosis, and monitor blood conditions or treatment ...

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Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Samantha (Sam) Silberstein, CFP®, CSLP®, EA, ...

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