Please tell me what are some of the dangers of breathing in second hand smoke?

Many listed: We gain such data examining the frequency of health impairment in those exposed to 2nd hand smoke, compared to that of the unexposed. It is well documented that 2nd hand smoke increases crib death risk and doubles ear and bronchial infections in infants. These studies have been repeated many times with the same results.

2nd hand smoke can: Have most of the dangers of 1st hand smoke such as emphysema, cancers, heart disease, also increased respiratory infections and ear infections in kids as well as adults.