Results Alter the analysis of multiple factors, the dangerous factors were puisne, often rheum, chronic respiratory disease history, bad healthy and so on.

• 结果多因素分析显示，低年龄段、经常感冒，有慢性呼吸系统疾病史和个人健康状况差，是个人好发急性呼吸道感染的危险因素。