The outbreak in Jeddah, Saudi Arabia, had six more cases, and Greece reported a case with a link to Jeddah.
Seven cases were added to the Jeddah outbreak in Saudi Arabia, and 3 in the UAE.
The disease has made a long-feared leap outside the Middle East, killing a man in Malaysia and infecting a nurse in the Philippines.
A Jeddah outbreak increased by 5 cases, while the WHO reports 10 recent cases in UAE health workers.
Saudi Arabia announces nine new MERS cases as Yemen reports its first.
Northern states appear to have higher rates of Escherichia coli O157 than southern states do, and young children appear to be infected most often, according to data from the Centers for Disease Control and Prevention (CDC) published today in Epidemiology & Infection.
All told, officials report 10 new MERS cases, 3 fatal.
The patients are all from Jeddah; the WHO, meanwhile, confirmed 5 other cases.
Saudi Arabian officials today reported four Middle East respiratory syndrome coronavirus (MERS-CoV) cases in Riyadh, one of them fatal and the other three severe enough to require intensive care.
A Saudi emergency department was closed for disinfection over MERS concerns after recent cases.