FILE PHOTO: A health worker gets a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at a COVID-19 vaccination center in Seoul, South Korea, March 10, 2021. REUTERS/Kim Hong-Ji/File Photo/File PhotoSEOUL (Reuters) – South Korea has inoculated 25% of its population with at least one dose of COVID-19 vaccine two weeks ahead of schedule, authorities