人类的健康正面临着传染病长期而可怕的威胁，如何控制传染病的传播一直是值得重视的问题。
The health of human is under the dire threat of infectious diseases. How to control disease spread is an important problem which should be paid much attention to.
人类的健康正面临着传染病长期而可怕的威胁，如何控制传染病的传播一直是值得重视的问题。
The health of human is under the dire threat of infectious diseases. How to control disease spread is an important problem which should be paid much attention to.
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