Another infectious disease has come into South Korea likely from North Korea:

South Korea was on alert Tuesday to prevent the spread of African swine fever after the first case of the animal disease was confirmed near the border with North Korea.
The agriculture ministry announced the beginning of operations to slaughter some 4,000 pigs as a precautionary step.
Kim Hyeon-soo, minister of agriculture, food and rural affairs, said quarantine officials are set to complete the culling of the pigs at three farms, including the one where the disease was detected, in Paju, just south of the inter-Korean border, by Tuesday.
Yonhap
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