According to recent data from South Korea’s Disease Control and Prevention Agency (KDCA), the number of reported norovirus infections has risen for four consecutive weeks.
From November 17 to 23, there were 69 reported cases of norovirus, followed by 80 cases from November 24 to 30, 114 cases from December 1 to 7, and 142 cases from December 8 to 14. The KDCA’s weekly report for December 15 to 21 (week 51) also revealed that 17 out of 175 samples (9.7%) tested positive for bacteria linked to acute diarrheal diseases.
Norovirus infections typically peak during the colder months, from November through April. The virus spreads mainly through contaminated food or water, exposure to an infected person’s bodily fluids, and person-to-person contact.
Symptoms usually appear within 12 to 48 hours of exposure, including vomiting, diarrhea, abdominal pain, chills, and fever. While most people recover within 2 to 3 days, the illness can be more severe for high-risk groups, including seniors over 65, young children under 5, and individuals with weakened immune systems. These groups may experience severe dehydration, which can be life-threatening without proper treatment.
There is currently no vaccine for norovirus, so prevention relies heavily on strict personal hygiene, especially frequent handwashing with soap. Public health experts recommend that schools and daycare centers enforce a 48- to 72-hour exclusion period for individuals with norovirus symptoms. At home, it’s crucial to isolate infected individuals to minimize the spread of the virus.
Food handlers and caregivers working with vulnerable populations, including children and older people, should refrain from working for at least 48 hours after symptoms subside. Additionally, surfaces and objects that may have been contaminated, including bathrooms, should be thoroughly disinfected using a solution of 0.1% to 0.5% detergent. When cleaning, wearing protective gear, such as masks and gloves, is essential to prevent further contamination.