South Korea has reported 17 cases of Middle East Respiratory Syndrome since a man tested positive following a trip to Saudi Arabia and became the country's first MERS patient earlier this month.
The virus in South Korea has so far been largely limited to medical staff who treated the first patient and who stayed at the same hospital with him, as well as his family members.
Ministry officials said the number could rise.
In addition to the 17 cases of MERS in South Korea, the son of one of the patients became China's first case of the virus last week after having traveled to the country despite being told by doctors to cancel his trip.
More From This Section
MERS was discovered in 2012 and has mostly been centered in Saudi Arabia. It belongs to the family of coronaviruses that includes the common cold and SARS, and can cause fever, breathing problems, pneumonia and kidney failure.
There have been 1,167 cases of the virus worldwide and 479 of the patients have died, according to the European Center for Disease Prevention and Control.