What should I do?

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After three tests of leukosytes, my result of white blood cells was low at 2.0, and the normal level is between 3.2-8.2. It is said that with a low level of leukosytes, one's immunity will decrease and would easily catch flu, etc. But for years I've never had flu or catched cold, and I haven't any symptoms of leukopenia. And I'm energetic everyday! Anyway now I want to ask what method could be the fastest way to increase leukosytes within 2 days? I heard that eating mushrooms could help increasing the leukosytes, could it be possible to increase the white cells in 2 days by just eating mushrooms during these 2 days? Thank you very much!!