The MERS virus developed in Saudi Arabia in 2012 and another in South Korea in 2015. The highly contagious MERS virus also originated in bats. and then move on to humans, the symptoms are fever, cough and shortness of breath in infected people.

Untreated MERS often progresses to severe pneumonia with a mortality rate ranging from 30% to 40%, making it the deadliest of the coronaviruses currently in circulation.