Ralph Tripp

1. IntroductionThe airways are the major point of entry for many pathogens. Among them, viruses, such as the respiratory syncytial virus (RSV), influenza (flu) A and B, parainfluenza (PIV) 1, 2 and 3 and adenovirus (AdV), are capable of penetrating the initial defenses of the upper respiratory tract (UTR), infect the lower respiratory tract (LRT) and cause a great burden in terms of severe disease ...