A scary new warning from the World Health Organization about a virus they say could threaten the entire planet. There are already 49 cases of this new strain of a corona-virus in eight countries. There is no prevention, no cure, and it's killing half the people it infects.
– CNN's Mary Snow reports
READ MORE: Should I be concerned about new virus?
CNN's Elizabeth Cohen on the spread of the coronavirus in the United Kingdom, a potentially fatal SARS-like virus.