A grandmother and two teenagers survived an apparent murder-suicide that left a husband and wife dead inside a home in Aldie, Va., the Loundoun County Sheriff's Office said.
6 doctors agreed: Croup: Croup is usually self-limiting, lasting 5-7 days, but as with any other respiratory infections, cough is usually the last symptom to go away. Postinfectious cough can last up to several weeks, and it can trigger brochospasm especially if the child has asthma.
Flu viruses can also survive as droplets in the air for several hours; low temperatures increase their survival in the air. Parainfluenza virus, which causes croup in children, can survive for up to 10 hours on hard surfaces and up to four hours on soft surfaces.