Hi and welcome to HCM!
Thanks for posting your query here.
picture-normocytic and normochromic means- the size and shape and colour of the red blood cells is normal. The WBC
levels are within the normal range except for the lymphocytes which shows an elevated level-93%. This indicates an acute viral infection. The smear for MP is for malarial parasite test. It is also negative. So the cause of fever
in your son is of viral in origin. You need to take some other tests to confirm the viral infection. It could be upper respiratory or a rota virus infection. The viral origin can be correlated clinically.
Hope this is helpful to you.