Your edges are clear. No signs of infection.

伤口很干净，没有感染的迹象。

They will be quarantined the full three weeks, but there is no sign of infection or disease.

他们要被隔离整整三周，但是没有感染或者患病的迹象。

A respiratory disease specialist said they involved otherwise healthy young people who had severe respiratory illnesses and no signs of infection.

呼吸系统疾病的一位专家说，他们的研究对象是患有严重呼吸道疾病且没有感染迹象的健康年轻人。

No redness or swelling, so it's no sign of infection.

没有红肿和发炎。

There were no signs of infection, which would be expected if the child had gotten its leg bitten off by a creature like a crocodile.

没有感染的迹象，这个孩子的腿如果是被鳄鱼之类的生物咬断就会有感染的迹象。

Only people who have been tested and found to be free of the virus and who show no signs of infection are being permitted to leave the cruise ship.

只有经过检查未被发现感染病毒，且没有感染迹象的人才可以离开邮轮。