Professor Leung said it was likely there were many more undetected cases.

The attacks in Paris raised worries about Islamist militants entering Europe undetected.

Apparently, she had an advanced form of leukemia that had gone undetected.

Early in 2020, the virus spread undetected for weeks in the US.

The downside is that the new fighters often fly with undetected flaws.

The faint note of humour in her tone passed undetected by him.

It would be impossible for an Infernal to infiltrate the building undetected.

No longer was it so mission-critical that the shrade's presence go undetected.

It was also the only way to get inside that train undetected.

Errors in moral calculations frequently escape undetected, even by the most accurate.

Most go undetected because they explode over remote areas or the ocean.

Concomitant qualitative assessments provided insight into barriers otherwise undetected in quantitative assessments.

The damage was done, and we had gotten away with it undetected.

The onset of hypothermia is slow and usually undetected by the victim.

Arnold therefore had a reasonable hope that it might be passed undetected.

For it to be undetected by any other NHS organisation is disturbing.