Oct 13, 2025 Minseo Kim www.bbc.com South Korea’s health authorities have stepped in after online rumors spread claiming COVID-19 vaccines could cause cancer. The Korea Disease Control and Prevention Agency (KDCA) said there’s no scientific proof that the vaccine directly leads to cancer, adding that such claims are “hard to verify and lack evidence.” The controversy started when a Korean research group published a study suggesting that vaccinated people might have slightly h