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Fatal illness remains unconfirmed
South Korean health authorities said they would maintain a “low” domestic risk assessment following the death of a Russian laboratory employee from an unidentified form of pneumonia suspected of being pneumonic plague.
The Korea Disease Control and Prevention Agency said the decision was reaffirmed during a situation review meeting on Oct. 12. The employee worked at an anti-plague research institute in Russia’s Irkutsk region and was hospitalized with pneumonia symptoms on Sept. 29. The patient’s condition worsened before the patient died Oct. 2.
Russian authorities identified 197 contacts, including laboratory employees and medical workers, with 189 under quarantine monitoring. The pathogen responsible for the illness has not been determined.
Based on limited available information, the World Health Organization and other major international health authorities have generally assessed the risk as low. The WHO said it had found no evidence of sustained transmission and cited the absence of a confirmed diagnosis as a key uncertainty.
South Korea strengthens monitoring
In an Oct. 7 rapid risk assessment, the KDCA rated the likelihood of the disease reaching South Korea as “very low” and its potential impact as “low.” Officials kept those ratings unchanged at the Oct. 12 meeting.
Although the pathogen remains unknown, authorities reviewed quarantine, surveillance, testing and contact-tracing procedures in case the illness was caused by the bacterium responsible for plague. Anyone classified as a suspected patient would be transferred immediately to a nationally designated isolation facility for treatment. The KDCA said South Korea has sufficient antibiotics and other treatments, including emergency reserves.
The agency plans to increase monitoring of travelers arriving after visiting or staying in Russia, particularly those with fever or respiratory symptoms. If the risk rises, officials could designate Russia as an area subject to additional quarantine controls.
What is pneumonic plague?
South Korea classifies pneumonic plague as a top-tier legally designated infectious disease. It can spread between people through infectious respiratory droplets and has an average incubation period of one to four days.
Symptoms typically begin with severe fever, headache, fatigue, vomiting and pronounced weakness. The illness can then progress to severe pneumonia marked by coughing, difficulty breathing, chest pain and watery or bloody sputum, and it can be fatal.
The KDCA said it would continue sharing information with the WHO and European health authorities. People who develop a fever or other symptoms within seven days of returning from an affected area should contact South Korea’s 1339 health hotline or a local public health center.
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