World Health Organization (WHO) Assistant DirectorÂGeneral for Health Security Keiji Fukuda, left, talks with Dr. Lee Jong-koo, director of Seoul National University's JW LEE Center for Global Medicine, during a press conference about MERS at the Sejong Government Complex in Sejong, south of Seoul, South Korea Saturday, June 13, 2015 (Photo: AP)
The World Health Organization said Wednesday that the MERS outbreak in South Korea was a "wakeup call" and urged all countries to be more vigilant.
The warning came as South Korea reported its 20th death from the Middle East Respiratory Syndrome virus.
"The outbreak really should serve as a wakeup call for countries," WHO assistant director general Keiji Fukuda said after an emergency committee meeting.
"All countries should always be prepared for the unanticipated possibility of outbreaks like this and other serious infectious diseases," a WHO statement said.
However, the UN health body said that "conditions for a public health emergency of international concern have not been met".
The virus appeared in South Korea on May 20 when a 68-year-old man was diagnosed after returning from a trip to Saudi Arabia.
Since then it has spread at an unusually rapid pace, sparking widespread alarm.
There is no vaccine for MERS which has a mortality rate of 35 percent, according to the WHO.
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