Asthma drug "cut attacks by a fifth" even for those with sever form of the disease

Asthma drug 'cut attacks by a fifth' even for those with severe form of the disease | UPDATED: 01:00 GMT, 16 September 2012 A DRUG that reduces the number of asthma attacks by more than a fifth could offer hope to hundreds of thousands of patients who suffer from the most severe form of the debilitating lung disease.