It seems that your son has picked up a second chest infection.This is probably a viral infection and is known as Recurrent viral wheezing and it is causing him to wheeze and cough due to inflammation of his small airways in his lungs. He will benefit from being on Singulair 4mg tablet at night every night for at least 2 weeks. Also either nebulise him with Duolin or Combivent twice daily to open his chest. He will take about 14 days to clear completely.At present your son's symptoms are more those of an infection than asthma.
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