The common cold is a contagious viral infection of the upper-respiratory passages. The nose, throat, sinuses, ears, eustachian tubes, trachea, larynx, and bronchial tubes are involved.
Nasal discharge is watery at first, then becomes thick and greenish yellow.
Cough that produces little or no sputum. Loss of appetite. The child should wash his hands frequently, especially after blowing his nose or before handling food. Keep the child away from the risks listed above. Use a cool-mist humidifier to increase air moisture.