Mers virus

The Middle East respiratory syndrome (Mers) has made its way to China with the first positive case announced on May 29, 2015. The patient is a South Korean traveller who came to Guangdong province via Hong Kong on business. Mers has killed more than 400 people in Saudi Arabia since 2012 and is considered a deadlier but less infectious cousin of the Sars virus that killed 299 people in Hong Kong in 2003.