The Korea Centers for Disease Control and Prevention once again advised people to refrain from using humidifier-sterilizers.
The advice was issued after a civic group claimed that 18 people died of a lung disease believed to have been caused by disinfectants in the machines.
The authorities asked supermarkets and retailers to recall the products in August, and is issuing the warning again to raise public awareness of the health threat.
More information on the relationship between humidifier disinfectants and the disease will be announced Friday.
