A worker in full protective gear disinfects the interior of a karaoke establishment in Seoul, South Korea, June 16, 2015. Two South Korean hospitals are conducting experimental treatment on Middle East Respiratory Syndrome (MERS) patients, injecting them with blood plasma from recovering patients, the health ministry said on Tuesday, as four new cases were reported. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

Workers in full protective gear disinfect the interior of a karaoke establishment in Seoul, South Korea, June 16, 2015. Two South Korean hospitals are conducting experimental treatment on Middle East Respiratory Syndrome (MERS) patients, injecting them with blood plasma from recovering patients, the health ministry said on Tuesday, as four new cases were reported. REUTERS/Kim Hong-Ji 

Workers in full protective gear disinfect the interior of an internet cafe as a man looks on in Seoul, South Korea, June 16, 2015. South Korea's health ministry reported four new cases of Middle East Respiratory Syndrome (MERS) on Tuesday, bringing the total to 154 in an outbreak that is the largest outside Saudi Arabia. REUTERS/Kim Hong-Ji 

A passenger puts a masks on her son to prevent contracting Middle East Respiratory Syndrome (MERS) at the Incheon International Airport in Incheon, South Korea, June 14, 2015. A South Korean hospital suspended most services on Sunday after being identified as the epicentre of the spread of a deadly respiratory disease that has killed 15 people since being diagnosed in the country nearly four weeks ago. REUTERS/Kim Hong-Ji 

An employee dressed in a Hanbok traditional costume wears a mask to prevent contracting Middle East Respiratory Syndrome (MERS) as she stands in front of a check-in counter at the Incheon International Airport in Incheon, South Korea, June 14, 2015. A South Korean hospital suspended most services on Sunday after being identified as the epicentre of the spread of a deadly respiratory disease that has killed 15 people since being diagnosed in the country nearly four weeks ago. REUTERS/Kim Hong-Ji 

Passengers wear masks to prevent contracting Middle East Respiratory Syndrome (MERS) at the Incheon International Airport in Incheon, South Korea, June 14, 2015. A South Korean hospital suspended most services on Sunday after being identified as the epicentre of the spread of a deadly respiratory disease that has killed 15 people since being diagnosed in the country nearly four weeks ago. REUTERS/Kim Hong-Ji 

Women wearing masks to prevent contracting Middle East Respiratory Syndrome (MERS) ride a subway train in Seoul, South Korea, June 12, 2015. South Korea has sealed off two hospitals that treated people with a deadly respiratory disease, officials said, even as the outbreak that has been spreading through health facilities could have peaked, with just four new cases on Friday. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

A woman wearing a mask to prevent contracting Middle East Respiratory Syndrome (MERS) walks out from a clothing shop at Myeongdong shopping district in central Seoul, South Korea, June 11, 2015. An outbreak of Middle East Respiratory Syndrome (MERS) forced South Korea to cut interest rates on Thursday in the hope of softening the blow to an economy already burdened by slack demand, as authorities reported 14 new cases. REUTERS/Kim Hong-Ji 

A couple wearing masks to prevent contracting Middle East Respiratory Syndrome (MERS) looks at each other as they ride on an escalator in Seoul, South Korea, June 11, 2015. An outbreak of Middle East Respiratory Syndrome (MERS) forced South Korea to cut interest rates on Thursday in the hope of softening the blow to an economy already burdened by slack demand, as authorities reported 14 new cases. REUTERS/Kim Hong-Ji 

An employee from a disinfection service company sanitizes an empty classroom of an elementary school in Seoul, South Korea, June 11, 2015. A joint South Korean-World Health Organization mission studying an outbreak of Middle East Respiratory Syndrome (MERS) recommended on Wednesday that schools be reopened, as they were unlikely to spread the disease, just as school boards recommended more be shut. REUTERS/Kim Hong-Ji 

A promoter of a cat cafe sits crouched at Myeongdong shopping district in central Seoul, South Korea, June 11, 2015. A deadly outbreak of Middle East Respiratory Syndrome (MERS) forced South Korea to cut interest rates on Thursday in the hope of softening the blow to an economy already beset by slack demand, as authorities reported 14 new cases and a 10th fatality. REUTERS/Kim Hong-Ji 

Tourists wearing masks to prevent contracting Middle East Respiratory Syndrome (MERS) walk at Myeongdong shopping district in central Seoul, South Korea, June 10, 2015. South Korean President Park Geun-hye postponed a U.S. visit on Wednesday to supervise the handling of an outbreak of Middle East Respiratory Syndrome (MERS), as two more people died and 13 new cases were reported, lifting the total number of patients to 108. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

Workers in full protective gear disinfect the interior of a subway train at a Seoul Metro's railway vehicle base in Goyang, South Korea, June 9, 2015. Hong Kong issued a "red alert" advisory on Tuesday against non-essential travel to South Korea, where eight new cases of Middle East Respiratory Syndrome (MERS) were reported, bringing the total to 95 with seven fatalities. REUTERS/Kim Hong-Ji 

Workers wearing masks disinfect the interior of a subway train at a Seoul Metro's railway vehicle base in Goyang, South Korea, June 9, 2015. Hong Kong issued a "red alert" advisory on Tuesday against non-essential travel to South Korea, where eight new cases of Middle East Respiratory Syndrome (MERS) were reported, bringing the total to 95 with seven fatalities. REUTERS/Kim Hong-Ji 

A worker in full protective gear adjusts his suit between subway trains at a Seoul Metro's railway vehicle base in Goyang, South Korea, June 9, 2015. Hong Kong issued a "red alert" advisory on Tuesday against non-essential travel to South Korea, where eight new cases of Middle East Respiratory Syndrome (MERS) were reported, bringing the total to 95 with seven fatalities. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

Military officials wearing masks as a precaution against contracting Middle East Respiratory Syndrome (MERS) check the body temperature of visitors sitting inside their car at the entrance of the Defense Ministry in Seoul, South Korea, June 9, 2015. REUTERS/Kim Hong-Ji 

An elementary school student wearing a mask to prevent contracting Middle East Respiratory Syndrome (MERS), receives a temperature check at an elementary school in Seoul, South Korea, June 9, 2015. South Korea's health ministry said on Tuesday there were eight new cases of Middle East Respiratory Syndrome (MERS), bringing the total to 95 but representing a sharp fall in the number of daily new cases from 23 reported a day earlier. REUTERS/Kim Hong-Ji 

A tourist wearing a mask to prevent contracting Middle East Respiratory Syndrome (MERS), is reflected on mirrors in Seoul, South Korea, June 8, 2015. South Korea reported a jump in cases of MERS on Monday while an 80-year-old man became the sixth fatality from the outbreak in the country and other Asian nations began taking preventive measures against the disease. REUTERS/Kim Hong-Ji 

Passengers wearing masks to prevent contracting Middle East Respiratory Syndrome (MERS) sit inside a train in Seoul, South Korea, June 5, 2015. South Korean authorities squabbled on Friday over their handling of an outbreak of Middle East Respiratory Syndrome (MERS), as a fourth person died and five new cases were reported. REUTERS/Kim Hong-Ji 

A Chinese tourist wearing a mask to prevent contracting Middle East Respiratory Syndrome (MERS) poses for photographs as men wearing traditional dress perform the daily reenactment of the changing of the Royal Guards, at the main entrance of the Gyeongbok Palace in central Seoul, South Korea, June 5, 2015. South Korean authorities squabbled on Friday over their handling of an outbreak of Middle East Respiratory Syndrome (MERS), as a fourth person died and five new cases were reported. REUTERS/Kim Hong-Ji 

A Chinese tourist puts a mask on her child's face to prevent contracting Middle East Respiratory Syndrome (MERS) at the Gyeongbok Palace in central Seoul, South Korea June 3, 2015. South Korean President Park Geun-hye said on Wednesday everything must be done to stop MERS as fear of the disease shut hundreds of schools and led to corporate giant Samsung calling off a staff conference. REUTERS/Kim Hong-Ji 

Passengers wearing masks to prevent contracting Middle East Respiratory Syndrome (MERS) walk past a thermal imaging camera at Incheon International Airport in Incheon, South Korea, June 2, 2015. South Korea on Tuesday reported its first two deaths from an outbreak of MERS that has infected 25 people in two weeks, as public alarm grew and officials scrambled to contain the outbreak. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

A health worker with protective suits sitting with people (R) who came into close contact with the Korean Mers patient arrive at Lady MacLehose Holiday Village in Sai Kung, where they will spend two weeks in quarantine, in Hong Kong, China May 30, 2015. China said on Friday a 44-year-old South Korean man had tested positive for Middle East Respiratory Syndrome (MERS), China's first confirmed case, but that it had not found any symptoms in 38 people who had been in close contact with him. REUTERS/Tyrone Siu

HEALTH-SOUTHKOREA MERS 0615 - Chart shows confirmed dates of MERS cases in S. Korea and deaths. (SIN04) 

HEALTH-SOUTHKOREA/MERS GLOBAL - Update. Charts the number of reported MERS-CoV (Middle East Respiratory Syndrome coronavirus) cases since 2012. (SIN07) 

HEALTH-MERS/SOUTHKOREA - Map locating health facilities that handled infected MERS patients. (SIN03)