Graphics: What's the difference between SARS, MERS and the novel coronavirus?

A mysterious pneumonia outbreak first reported December in Wuhan, central China's Hubei Province, has quickly spread across the country and around the world.

As of Saturday, the novel coronavirus epidemic, now declared a global health emergency by the World Health Organization (WHO), has sicken over 14,300 people and killed over 300 in China.

Scientists have attributed the outbreak to "2019-nCoV," a new strain of coronaviruses that has not been previously identified in humans.

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Graphics: What's the difference between SARS, MERS and the novel coronavirus?