None of the three have the same surname and all were infected at different times, suggesting they are not related to each other and probably contracted the disease separately.
上述三人不同姓，感染时间也各不相同，这说明他们没有亲属关系、具体感染来源可能也各不相同。
"I laughed and said:" We the people of the same surname can not love the question, what is your view, that Come and listen.
可我妈有意见，因为他也姓张，我妈说两人同一个姓不吉利。
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