There are several allergens which are responsible for the onset of asthmatic bronchitis. The main cause of asthmatic bronchitis is the external agents rather than bacteria or viruses. The external irritants increase asthmatic bronchitis.
There are several allergens which are responsible for the onset of asthmatic bronchitis. The main cause of asthmatic bronchitis is the external agents rather than bacteria or viruses. The external irritants increase asthmatic bronchitis.
