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Pneumonia can be mild or it can be severe, and it can have long-term effects for a child, such as chronic lung disease, lung function deficits, and increased risk of adult asthma, chronic obstructive pulmonary disease unrelated to smoking, and bronchiectasis.

Among these, nontuberculous mycobacteria infections are notorious for their stubborn resistance to conventional medication and their penchant for afflicting those with existing lung diseases such as bronchiectasis, chronic obstructive pulmonary disease and cystic fibrosis.

My death is close at hand, however, because of a lung condition called bronchiectasis, and I am on oxygen day and night.

There was a little scarring — where the narrow treelike branches of the airways got stretched out and baggy in what was called bronchiectasis.

Her mother struggled with asthma — Ms. Durham was also sickly as a child, diagnosed with the lung condition bronchiectasis — but often joined in family gatherings around the piano, where Ms. Durham and her older sister sang Bing Crosby songs and other pop standards.