Having a child is a great time for parents to quit smoking, as baby provides a lot of motivation for quitting this habit. Second hand smoke exposure is bad for the child as it causes ear infection, more frequent and severe asthma attack, respiratory symptoms (e.g., coughing, sneezing, shortness of breath, respiratory infections (i.e., bronchitis, pneumonia) and a greater risk for sudden infant death syndrome (SIDS).
In case the parent or adult in the house does not quit smoking completely, at least smoking inside the house should be completely banned. Smokers must go outside for smoking. The child mus not be able to smell the smoke, even from the clothing. One strategy is to have a 'smoking jacket' which the smoker wears at the time of smoking outside and takes off before entering the house.