Most cases of bronchial asthma are not an underwriting worry. It is a common disease, affecting between five to 10 percent of the population. But asthma is also becoming more concerning than it was ten or twenty years ago. Prevalence, hospitalizations, and fatal asthma cases have all increased, and there were close to 4,000 asthma deaths in the United States last year. Knowing which cases are the most concerning is the key to successful underwriting and case placement.