What are viruses? And how do they spread?
Media playback is unsupported on your device
Video

Coronavirus: What are viruses? And how do they spread?

Concerns are growing that the recently-detected coronavirus may spread around the world.

The London School of Hygiene & Tropical Medicine's Dr Rosalind Eggo explains how that can happen.

  • 24 Jan 2020
Go to next video: Storm Dennis: South Wales under water as floods hit