The viruses that cause croup can be spread easily through coughing, sneezing, and respiratory secretions (mucus, droplets from coughing or sneezing). Children with croup should be considered contagious for three days after the illness begins or until the fever is gone.
How long does it take a child to get over croup?
How long does Croup last? – Croup often runs its course within 3 to 4 days. Your child’s cough may improve during the day, but don’t be surprised if it returns at night. You may want to sleep near your child or even in the same room so that you can take quick action if your child’s symptoms become severe.