Between people[edit]
There has been evidence of limited, but not sustained spread of MERS-CoV from person to person, both in households as well as in health care settings like hospitals.[7][19] Most transmission has occurred "in the circumstances of close contact with severely ill persons in healthcare or household settings" and there is no evidence of transmission from asymptomatic cases.[20] Cluster sizes have ranged from 1 to 26 people, with an average of 2.7.[21]