undetected

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Health authorities think the virus might have infected far more people across a broader region after spreading undetected for weeks.

From The Wall Street Journal • May 26, 2026

The first known case was a nurse who developed symptoms on 24 April, so the virus had been spreading undetected for weeks.

From BBC • May 18, 2026

A higher threshold may reduce wrongful interventions but could allow legitimate threats to go undetected.

From Salon • May 12, 2026

"This won't eliminate deepfakes entirely, but it can significantly reduce their reach and impact by making it harder for manipulated content to go undetected or unchallenged," he added.

From Barron's • Apr. 24, 2026

If undetected, it can lie dormant in the human body for years before erupting in a positive fiesta of maladies.

From "A Walk in the Woods" by Bill Bryson