The World Health Organization (WHO) said Tuesday that South Korea could expect further cases of the Middle East Respiratory Syndrome, or MERS, USA Today reports. The disease has killed two people since the first case was confirmed on May 20. According to Reuters, South Korea’s health ministry confirmed five new cases of the virus Wednesday, bringing the total number of cases in the country to 30—the largest outbreak outside of Saudi Arabia. South Korea has isolated about 750 people after they came into contact with patients infected with the virus, which results in coughing, fever, shortness of breath, and further complications of pneumonia and kidney failure.