<s>[INST] I recently had a physical, including a CBC. Everything was in the normal range ( WBC , RBC , Hemoglobin , Lymphocytes, etc.) except for my Eosinophils. Mine were 17 (range from 0-5) and my EOS was 1.4 (range from 0.0-0.7). I m going back to my doctor in 2 weeks to do another CBC to see if they are still elevated. What could be the cause of this? [/INST] Thanks for your query. An eosinophil is a type of white blood cell. Eosinophils are produced in the bone marrow and are normally found in the bloodstream and the gut lining. Common causes of high eosinophil counts are parasitic infections, asthma,hay fever & allergies to Chat Doctor.  Though the list of causes is exhaustive it is good idea to repeat the counts after 2-3 weeks before proceeding for further work up. </s>