Adults who have a family history of asthma are up to six times more likely to develop the disease than others, a new study has found. Research on 1,500 adults found that those who had a strong family history of the respiratory disease, as well as other risk factors such as obesity, low-income, or smoking were 4.8 times more likely to develop adult-onset asthma in their early twenties. People who were at "moderate" risk were 2.4 times more likely to develop the disease. Researchers say this...