Norovirus infections, which occur predominantly during winter months, have surged nearly 60% compared to the same period last year, with infants and young children accounting for the largest share of cases, according to health authorities.
Data released Wednesday by the Korea Disease Control and Prevention Agency (KDCA) from sentinel surveillance of 210 hospital-level medical facilities showed 127 norovirus patients during the 48th week of the year (November 23-29), up 58.8% from 80 cases in the same week last year.
Children aged 0-6 accounted for 38 cases, or 29.9% of the total, while those aged 7-18 represented 33 cases, or 26%.
The virus typically spreads in Korea from winter through early spring (November to March). Infection occurs primarily through consumption of contaminated water or seafood such as shellfish, though person-to-person transmission through contact with infected individuals is also possible. Symptoms including vomiting and diarrhea typically appear within 12 to 48 hours of infection, with some patients also experiencing abdominal pain, chills and fever.
The surge raises particular concern as raw oysters and clams are popular winter delicacies in Korea, requiring caution when consuming uncooked seafood.
To prevent infection, health authorities recommend washing hands with soap for at least 30 seconds, rinsing food ingredients under running water, and cooking food thoroughly at 85 degrees Celsius or higher for at least one minute.
Infected patients should refrain from going to school or work until 48 hours after symptoms subside and should use separate bathroom and living spaces from other family members. Closing the toilet lid before flushing can also help prevent the spread of the virus through droplets.
"To prevent norovirus infection, I urge the public to follow prevention guidelines such as proper handwashing and to consume safely cooked food," KDCA Commissioner Lim Seung-kwan said.
