WHO says deadly MERS virus very serious, but **t an emergency
 

* MERS virus first emerged in Middle East in 2012 * More than 500 cases worldwide so far; The virus, which causes coughing, fever and sometimes fatal pneumonia, has been reported in more than 500 patients, mainly in Saudi Arabia, and has spread to neighbouring countries, as well as in a few cases to Europe, Asia and the United States. The WHO's emergency committee, which met for five hours in Geneva on Tuesday, said on Wednesday that the seriousness of the MERS situation had increased in terms of public health impact, but there is ** evidence of sustained human-to-human transmission of the virus.

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