NEET BIOLOGY

Detailed explanation-1: -Chronic bronchitis is not caused by a virus or bacteria.

Detailed explanation-2: -Yes. Most of the time, acute bronchitis is caused by a virus, such as the flu (influenza) virus. However, many different viruses-all of which are very contagious-can cause acute bronchitis.

Detailed explanation-3: -Bronchitis can be viral or bacterial. Acute bronchitis, however, is typically viral and caused by the same viruses that lead to common colds and influenza (flu). That said, it is possible to have viral and bacterial bronchitis at the same time.

Detailed explanation-4: -Bronchiolitis is a common lung infection in young children and infants. It causes inflammation and congestion in the small airways (bronchioles) of the lung. Bronchiolitis is almost always caused by a virus.

Detailed explanation-5: -The bronchitis infection can be caused by either a virus or bacteria, although viral bronchitis is much more common. In most cases, bronchitis is caused by the same viruses that cause the common cold or flu.