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.
Halo: Combat Evolved's gameplay was characterized by several features which set it apart from less acclaimed first-person shooter games of its time. 1  Storyline execution: Halo: Combat Evolved's gameplay and storyline are tightly interwoven, delivered in a convincing manner consistent with the flow of the game. Vehicular incorporation: Halo: Combat Evolved's includes the option for players to control multiple land and air based vehicles in third-person view.