as much as i would like to help you it is really impossible to diagnose anyone over the internet without the benefit of a detailed medical history some diagnostic tests and of course a hands-on examination. many of these illness can be attributed to back-to-back viruses. this may be the reason he has not responded to the antibiotics. the chest x-ray and blood work may reveal a mild pneumonia so your answer may be forthcoming. in children viral pneumonia is also common.
my 7 year old has been sick for a month - fever productive cough fatigue. three different antibiotics. what is it? . today the doctor said he had a clean exam but she acknowledges something is wrong. the fever had been hovering around 100 for the last several weeks but spiked to 103. 9 today. he had a chest crazy and blood work today. no results yet. what is keeping him so sick?