Chlorine is a toxic halogen gas discovered in 1774 that is important for water purification. It can cause respiratory issues. Asthmatic bronchitis is an inflammatory airway condition that causes the airways to narrow. Symptoms include inflamed and mucus-filled bronchial tubes, difficulty breathing, and wheezing. Prevention focuses on avoiding irritants and air pollution. Treatment may include antibiotics for bacterial infections, staying hydrated, using a vaporizer, cough suppressants, and natural remedies.