Hi Dear Welcome to the board of Health care Magic, Dear friend it is common to develop respiratory tract infection recurrently. some times six to twelve times a year. and this frequency is labelled as routine normal. This is more common especially in top fed children means did not fed exclusively breast milk. Hygiene maintenance;- feeding bottle ,self. Good nutritious balanced diet. Avoid contacts with infected people. Regular supplementation of multivitamins & Iron syrups to improve the immunity . Hope your query is answered Thanks