Your son almost certainly has had a viral infection of his upper airway and his chest.He does not have a fever so he is in the late stages of this illness and should get better by himself. You need to clear his nose more effectively and more often so use a Sterimar nasal spray at least twice a day. You can use the Ventolin inhaler two puffs twice daily and give him Mucospect twice a day as well to help him to clear the mucous from his chest and sinuses.
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