Middle East respiratory syndrome coronavirus (MERS-CoV)
Reported on 24 September 2012 on ProMED-mail
The new Mers virus, which has killed half of those infected, is "unlikely" to reach the same scale as Sars.
Most of the 90 Mers cases reported in Saudi Arabia.
Mers is from the same group of viruses as the common cold. Sars killed 774 people.