A narrowing of the smallest airways in the lung (bronchioles) causes wheezing. This narrowing results from swelling caused by a virus. The respiratory syncytial virus (RSV) causes most bronchiolitis.

Thinking of traveling with a dog? Discover the best and worst dogs for digital nomads. Expert tips from 3+ years on the road.

If you’ve never encountered a Bichon Frise in real life, first of all, I’m so sorry. But picture this: a tiny, cloud-like ...