Hi Dr, my child was at a pediatrician about 2 months ago because he has had a cough , runny noise, was vomiting and high fevers. So the Dr said we must do allergy tests and it did show that he is allergic to all kinds of grass the rating was a 3+, wheat the rating was a 1, bed mites, dust etc was also a 3+, and cat & dogs were a 2, and he is allergic to egg whites and nuts but also not so highly allergic. So the Dr gave him allergy meds for 3 months, he came right in the school holiday which was 3 weeks. He started school on Monday and yesterday which was the Thursday he vomited again and is running a very high fever. What could it be?