My 5 Year Old Daughter Gets A Cough And Cold

My 5 year old daughter gets a cough and cold very easily. With every change in the weather she keeps me on my toes. What worries me that this constant every 2 month trauma affects her daily routine especially school.

And once the cough goes beyond 3 days I use the nebuliser using Dublin and budecart. Is this safe and ok to use.

Please advice!