Rubella is an acute respiratory infectious disease caused by Rubella viruses, and it is a "c" class infectious disease in China.

风疹是由风疹病毒引起的急性呼吸道传染病，在我国目前规定为丙类传染病。

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Diphtheria is causes by the diphtheria clavate bacillus threatens the enormous one kind of acute respiratory tract infectious disease to the child.

白喉是由白喉棒状杆菌引起的对儿童威胁极大的一种急性呼吸道传染病。

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Severe acute respiratory syndrome (SARS) is an infectious disease, which spread rapidly and caused high mortality rate. Currently, no effective drugs against SARS are available.

SARS是一种传播速度快、死亡率高的疾病，目前没有有效的治疗药物，因此围绕抗SARS药物的研究一直是各国研究的热点。

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