随着病程进展，患者的传染性愈加强烈，在疾病的严重期传染性最大。

Patients become increasingly infectious as their illness progresses, and are most infectious during the phase of severe illness.

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从总体上看，研究人员并未发现这四组病人之间有重大差异，但没有服用药片的病人的感冒病程略长、病情也略为严重。

Overall, researchers didn't find major differences between the four groups, but the length and severity of colds was slightly worse among patients who didn't receive pills.

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最近对研究的荟萃分析显示，出现感冒症状24小时内服用锌，能够将病程缩短一天，但不会减轻感冒的严重程度。

A recent meta-review of research showed that taking zinc within 24 hours of the onset of symptoms can reduce the duration-but not the severity-of a cold by one day.

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