You do not mention your son's age but he seems to have had a bad cold at first which then affected his chest causing an illness called bronchiolitis. This illness usually takes at least 3 weeks to clear up completely.As it is caused by a virus infection antibiotics do not help. Keep your son's nose clear by using Sterimar nasal spray twice a day and continue giving him the Bisolvon and nebulising with Duolin twice a day. You do not need to use the Pulmicort.
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