A suspected case of highly pathogenic avian influenza (AI) has been confirmed at a laying hen farm in Cheonan, Chungcheongnam-do, with results pending for confirmation of high pathogenicity. The farm houses around 54,000 laying hens and is located near three other hen farms, raising a total of 286,000 chickens. The Central Accident Control Headquarters is conducting an examination and implementing quarantine measures such as access control, preventive slaughter, and epidemiological investigation to prevent the spread of AI.