The nearest related virus is found in bats, and it is speculated that it passes to camels via dates infected by bat droppings and then onto humans. Transmission from camel to human - and between humans - is also not fully understood. - See more at: http://www.ummid.com/news/2013/July/01.07.2013/world_exprts_on_virus.html#sthash.AVAiUxPW.dpuf
The nearest related virus is found in bats, and it is speculated that it passes to camels via dates infected by bat droppings and then onto humans. Transmission from camel to human - and between humans - is also not fully understood.