猩红热的接触传染性很强。
如果你知道有人生病了，那么就要避免亲密的接触，若一旦接触了，就要经常用肥皂水洗手并且保持和他人的距离，因为感冒具有传染性。
If you know of someone who is ill, avoid close contact. Once exposed, frequently wash your hands with soapy water and keep your distance from others, as colds are contagious.
在任何接触性传染病的传播中，每一次传染都涉及两类人，一类是已患病者，一类是未患病者。
In the spread of any contagious disease, each act of infection has two parties, one who already has the disease and one who does not.
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