It is the mystery new disease that has put authorities around the world on high alert. Already, two people have died and 43 have been infected with a never-seen-before pneumonia.

The disease, which emerged in China in December, has already spread to other countries and testing has confirmed the presence of a new coronavirus - one of a family of viruses which have proved particularly deadly over the last few years, infecting more than 10,000 and killing around 1,600.

Experts are now asking if this new virus has similar epidemic potential. But with so much still unknown, they will have a battle on their hands to contain it.

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