<unk>  is contagious during the first few days of the infection. Basic hygiene including hand washing can prevent transmission. There are no vaccines that have been developed to prevent<unk> , however, many cases of<unk>  have been prevented by immunization for influenza and diphtheria. At one time,<unk>  referred to a diphtherial disease, but with vaccination, diphtheria is now rare in the developed world.
Croup
Foreign body
Bronchorrhea
Epiglottitis
Tonsillitis
Tracheitis
Laryngitis
Post-nasal drip