Officials are investigating the extent of infection among patient contacts, the source of each cluster infection, and any possible links between hospitals.
The total number of confirmed Middle East respiratory syndrome (MERS) cases recorded since September 2012 is 1980, including 699 known deaths.
Saudi Arabia has reported 14 new cases of Middle East respiratory syndrome (MERS) including 10 which are linked to a hospital or hospitals.
This year, Middle East respiratory syndrome (MERS) cases have been moderate in Saudi Arabia.
The Qatar Ministry of Public Health (MOPH) announced that a new Middle East Respiratory Syndrome Corona Virus (MERS-CoV) case has been confirmed, marking the third confirmed MERS-CoV case this year.
An analysis of blood samples taken during South Korea's MERS-CoV outbreak found that disease antibodies were undetectable in four of the six people who had mild infections.
The evolutionary origins of Middle East respiratory syndrome (MERS) coronavirus (are unknown.
Cohort quarantine may have limited community spread, but transmission occurred among members of the hospital cohort quarantined together.
For the second time, in April, Qatar has announced a case of Middle East Respiratory Syndrome (MERS).
The World Health Organization (WHO) has called for more research on Middle East Respiratory Syndrome (MERS) for a better control of the disease.