Season One Edit. Beckett's initial relationship with Castle was strained because she viewed him as immature and reckless. She suspected (correctly) that Castle was using his research as an excuse to pursue her, and only tolerated his presence at the request of Captain Montgomery.
What causes croup in children. Croup in children is most often caused by the parainfluenza virus, a respiratory virus not related to the flu. But it can also be caused by other respiratory viruses including the flu. Yes, croup is contagious.
Most at risk of getting croup are children between 6 months and 3 years of age. The peak incidence of the condition is around 24 months of age. Complications. Most cases of croup are mild. In a small percentage of cases, the airway swells enough to interfere with breathing. Prevention. To prevent croup, take the same steps you use to prevent colds and flu.