How long will my 8 month old be suffering from bronchiolitis?

7-10 days - varies. Bronchiolitis is a viral illness in kids. Usually lasts anywhere form 7-10 days, but it can last longer. However, a child can have more than one episode of bronchiolitis during the season. No medications are usually needed and the pediatrician can most often monitor your child without a hospital visit.
A few weeks. The symptoms of bronchiolitis will generally end in one to four weeks in children with no other lung problems. Other lung problems such as asthma or bpd can make it last longer and asthma can follow it. If your child's problems last two to three weeks or seem to be getting worse, be sure to contact your child's doctor. The RSV strain in winter 2012 seems to be a particularly severe strain.