<s>[INST] 97 year old father admitted to hospital with pneumonia.  Levaquin drip started.  White count has remained high after a week (39000).  He has subsequently been transferred to rehab and put on oral Levaquin.  Concern is that he may possibly have leukemia because white count isnt coming down. [/INST] Hi and thank you so much for this query. I am so sorry to hear about this high white cell count and the pneumonia that your father has. A high cell a lone is not very suggestive. Leukemia would present with abnormal cells that would have raised this suspicion. Because this was identified in the context of an infection, it makes sense to think it is related to the infection and not otherwise. If reasons to remain to suspect it after the treatment, then the doctors would consider that. A count of 39000 seems not too alarming for the infection he has. Let's monitor again to see whether it remains that high. I hope this ad Chat Doctor.  If you have more related questions, feel free to ask me and I will gladly add </s>