South Korea raised its health alert level after confirming the sixth African swine fever case since the start of the year.

Yonhap reported that the Disaster Management Agency received a notification of a new infection at a farm in Dangjin, South Chungcheong Province.

Though the disease does not infect humans, it spreads rapidly among pigs and can be fatal.

Authorities issued a red alert — the highest level — in an effort to contain the outbreak and prevent further spread.