病毒呈

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1.
of those whose exposure cannot be determined , serology results show that more than half were negative for coronavirus .
他续说：至于那些未能确定感染途径的个案，血清测试结果显示当中过半数的个案最终对冠状病毒呈阴性反应。
www.ichacha.net
2.
Even a positive HIV diagnosis does not necessarily mean that the illness will move into the active stage.
即使诊断出艾滋病病毒呈阳性，也不一定就意味着疾病会进入活跃期。
blog.sina.com.cn
3.
For months October-December, the total number of positive specimens for viruses was 11.
十月至十二月份，对病毒呈阳性的样本总数为11个。
www.chp.gov.hk
4.
For months January-December, the total number of positive specimens for viruses was 43.
一月至十二月份，对病毒呈阳性的样本总数为43个。
www.chp.gov.hk
5.
For months July-September, the total number of positive specimens for viruses was 23.
七月至九月份，对病毒呈阳性的样本总数为23个。
www.chp.gov.hk
6.
For months January-March, the total number of positive specimens for viruses was 29.
一月至三月份，对病毒呈阳性的样本总数为29个。
www.chp.gov.hk
7.
For months April - June , the total number of positive specimens for viruses was 4 .
四月至六月份，对病毒呈阳性的样本总数为4个。
www.mcyber.space
8.
The update also covered certain countries reporting active pandemic influenza virus transmission.
一些国家报告称，大流行性流感病毒呈活跃性传播，在介绍最新情况时也已囊括这一情况。
www.who.int
9.
Also on Tuesday, health officials in Vietnam said an 8-year-old girl had tested positive for the disease, the Associated Press reported.
据美联社（AssociatedPress）报导，越南卫生部门官员周二也表示，一位8岁的女童经检测禽流感病毒呈阳性反应。
www.ebigear.com
10.
Almost all cards that mosquitoes had fed on tested positive for the viruses they carried.
几乎所有蚊子吸食过的卡片上都检测出他们所携带的病毒呈阳性。
article.yeeyan.org