Infants and young children are very affected by second hand smoke because their lungs are weak and are just beginning to develop. Each year passive smoke causes 300,000 respiratory or lung infections in children younger than a year and a half. 15,000 of them must be hospitalized. Children of smokers have more colds, pneumonia, bronchitis, ear infections, and asthma attacks. They may suffer from coughing, wheezing, too much phlegm or mucus, burning eyes, headaches, and sore or dry mouth. In addition, smoking can make any allergies related to breathing worse.