Laboratory tests by ELISA method of serum samples for this and 50 other contact were found to be negative.

采用ELISA法对该人及50名其他接触者的血清样本进行的实验室检测均呈阴性。

youdao

A close relationship inevitably generates both positive and negative emotions. Where there is contact, there is friction.

亲密的关系不可避免会同时产生正面的和负面的情绪。有接触的地方就会有磨擦。

youdao

Please contact us before leaving any negative or neutral feedback. We will work with you to solve any problems.

请联系我们并留下任何负面的或中性的信息。我们将与您一起解决任何问题。

youdao

She said reducing contact time would have a negative impact.

BBC: Teacher of the deaf

He realized that when he was uncertain about a topic he was discussing, "instinctively I wouldn't make eye contact, and that comes across as a negative, " he says.

WSJ: The Decline of Eye Contact

He is restricted to a special "negative pressure" room that traps and cleanses air particles, and medical staff will wear masks when in contact with him.

BBC: Andrew Speaker conducted the interview wearing a mask