Companies are always searching for new cures for common diseases. Although there are already existing cures for many of these diseases, lots of these cures involve antibiotics. These disease are always becoming more and more resistant to the most common antibiotics, making them work less often as a cure. Also, some people are allergic to the most commonly used antibiotics. A new bronchitis cure, for example, could bring in a lot of new money to the pharmaceutical company that develops it, as it would be another option for when the most common cures no longer work, or for people who are allergic to the usual cure.