Sixty percent of asthma cases in adults and 85 % in children are triggered by colds and other upper respiratory infections. Asthma sufferers have to be especially on guard against the common cold.
百分之六十的成人氣喘和百分之八十五的小兒氣喘，都是因為感冒等上呼吸道感染而發作，氣喘患者要小心提防。