COPD exacerbations are also known as acute
exacerbations which is a worsening of COPD symptoms. There are many causes of
acute exacerbation are: Respiratory exacerbation, in which many bacteria
(pathogens) and viruses, not only this but allergens, toxins and air pollution
is also responsible for COPD. In the one-third of all the COPD cases, the
causes cannot be identified. It can be prevented by vaccination against the
pathogens and also by some agonists (long acting beta-adrenoceptor agonists(LABAs)), inhaled
corticosteroids, antibiotics and antivirals.