Oh no mate! Another ONE! BUT YOU HAVE TO KEEP GOING! EVERY TEST WILL HAVE ONE OR MORE OF THESE DISEASES BECAUSE YOU CANNOT AFFORD TO MISS THEM. IT AIN"T JUST ANOTHER COLD BABY.
This boy has low IgG and presents like WAS syndrome with continued bacterial infections, diarrhea. And you find out this is X-linked too! In the absence of functional Btk, mature B cells expressing surface immunoglobulin and the marker CD19 are few to absent. What disease?