My 5 Yrs kid CBC results (during past 6 months): MCV=75, WBC < 5, platelet > 380, Neutro < 15, Lymph > 70, Mono > 10 Can u help me pls?

Hard to comment. These lab values by themselves don't point to anything in particular.The MCV is a bit small, but without the full CBC and a reason why it was obtained, nothing can be inferred from the data.