Bronchitis is usually mild and normally doesn't cause any long-term damage, but it can become serious in elderly people, people who smoke, or those who are chronically ill with heart or lung disease.

人们患的支气管炎通常轻微，一般不会造成任何长久的伤害，可是对老年人、吸烟者或其他患有慢性心脏或肺部疾病的人，可能让支气管炎更严重。

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Charlotte, who weighed just a pound and measured only five inches when she was born three months premature at St Mary's Hospital, Portsmouth, last October, has serious brain, lung and kidney damage.

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