I have gone over in my head a million times, how did this happen,...

I have gone over in my head a million times, how did this happen,it consumes my thoughts, i think about it often,my son had one devastating asthma attack, the only one we ever had at age 10, he was on a vent for 10 days in the icu for 14 days, on the ward for 7 days,they did allergy testing and said he was virtually allergic to everything,his blood showed allergens over 1000, normal would be below 200,i then questioned how can that be, he has been in a sterile enviroment for almost a month,surely then he would be allergic to the meds, well they thought i was nuts, how stupid of me to even bring that up, well 3.5 yrs later, how stupid of you not to believe me.