The protein on the surface of the virus, called gp120, constantly mutates to escape detection by antibodies.

FORBES: Outsmarting AIDS

The malicious program lay dormant on many handsets for weeks to escape detection, said security firm Lookout which uncovered BadNews.

BBC: Russian BadNews bug found in Android app store

Charitable fraudsters tend to be recidivists that, apparently due to a lack of scrutiny characteristic of these organizations, escape detection.

FORBES: Charities No Better At Investing Since Madoff

These viral stalwarts then mutate to escape detection and start to flourish, expanding until new antibodies are generated to dispatch them.

CNN: Possible step toward AIDS vaccine development

But with proper policing of exports and timely intelligence tip-offs, it will be a lot harder for cheats to escape detection.

ECONOMIST: And the will to enforce them

Studies show more than four million people a year in the U.S. drive while intoxicated, but about half of the intoxicated drivers stopped by police escape detection, the NTSB report said.

WSJ: U.S. Board Urges 0.05 Drunk-Driving Threshold

It is also possible that a proportion of girls with mild autistic traits lose those traits early on and so escape detection by 8 years of age (the age of the children in the CDC study).

CNN: How girls and boys differ when it comes to autism

An official investigation found that the two, who committed suicide in November while on the run from police, were able to escape detection for so long because officials never suspected a neo-Nazi link to the killings.

WSJ: German Intelligence Chief to Step Down

Black holes are notoriously difficult to study, since so much in astronomy depends on the detection of light - and within a certain distance from a black hole, even that cannot escape.

BBC: First glimpse of a black hole's spin