My daughter's symptoms started around 5 yo. They were pretty severe. Antibiotics didn't touch it. We had 6 rounds of HD IVIG with amazing results. We saw some minor flares after infections but nothing compared to original symptoms. What I found extremely helpful was liposomal colostrum. I will keep her on it thru fall and winter. She seems to do pretty good in summer. Ill also treat with D with K throughout year