1 In many cases of bronchiectasis a clear-cut cause cannot be identified. 2  Some respiratory infections in childhood can damage the airways and lead to bronchiectasis. 3  These may be viral infections (such as cause some types of bronchiolitis, or measles) or bacterial infections (such as whooping cough).ence, physiotherapy is needed to help clear these secretions. Normally the airways in the lung are sterile-they are not infected. In bronchiectasis, because of the inability to clear secretions effectively, these secretions become infected.
Halo 4's multiplayer features aspects from both Halo 3's and Halo: Reach's multiplayer. Sprint is now an ability that everyone can use along with their Armor Abilities. Firefight has been replaced with Spartan Ops, and like Firefight, Spartan Ops can be played online.
Despite the lack of a party-enabled ranked mode, there are other options that do allow you to play with your friends. The first option comes in the form of the âKill Your Friends Modeâ wherein 2-5 friends are able to gather together in a lobby and enter a match among only themselves.