Some viruses can play a deadly game of hide and seek inside the human body. Ebola is one example of a virus that can hide in the body even after a patient recovers and tests negative.
These viruses are tiny and sneaky, always looking for ways to infect humans. Their ability to hide is less well-known and can have devastating implications.
The human body has several effective hiding spots that some of the world's nastiest viruses have discovered, such as the eyes and the testes, which are beyond the reach of the immune system.
It's in these areas that submicroscopic viral RNA can safely linger, often without the human host's knowledge.
They'd fallen ill, then appeared to beat the virus. But that hidden virus is capable of springing back into action.
This hidden virus can emerge from hiding, either sickening the original host or slipping into semen or breast milk and infecting someone new.
Author's summary: Viruses can hide in the human body and reemerge years later.