Hello Elizabeth! Most often respiratory tract infection in children is caused due to certain viral infections. Most often such infections are associated with allergic reactions. Giving some antiallergic like cetirizine syrup for a few days should help in relieving the problem. Levolin is a bronchodialator and is meant to reduce wheezing. So, you can give Levolin only if you feel that the child has respiratory distress or wheezing. You can be patient and observe the child since such episodes usually last for 5-7 days irrespective of treatment. Give paracetamol in case the temperature rises. In case the child grows lethargic or starts wheezing, I would suggest you to take the child to the emergency of a hospital without delay.