A usually dry cough that lingers after a cold is typically due to bronchial hyperreactivity or tracheal inflammation, doctors say. 'After you go through an infection in your respiratory system, you can almost have a transient form of asthma where your bronchial tubes are very highly reactive and very irritated and inflamed,' said Dr. Moyer, of Temple University Hospital.
有些专家认为,在感染了一种感冒病毒、免疫系统减弱后,你会更容易感染另一种病毒。这是因为当你感冒时你鼻内的上皮衬里会变弱,充当保护屏障的黏膜受损后可能更易于感染另一种病毒。
A review of various studies, published last year in the journal Annals of Family Medicine, found that coughs on average last about 18 days. The report also said a survey of nearly 500 people found that most participants expected a cough should disappear in about a week and believed antibiotics from their doctor would help them. (A big no-no!)
但是,另一些专家则持有不同看法。NIH的福西医生说,干扰素之类的蛋白质(在感冒期间分泌以帮助抵抗病毒)可能会提高对感染第二种病毒的抵抗力。
Some experts believe having one cold virus and a weakened immune system could make catching another virus easier. Because the epithelial linings in the nose are weakened when you have a cold, the broken down mucus-membrane barrier may be more prone to picking up another virus.
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