S. Korea shortens dosage interval for Covid booster shots over waning … stocking 0 55 2021.11.18 15:09 https://youtu.be/dLaP5LuBe9Q + 36 추가접종 기간 단축, 돌파감염, 중증진행 예방효과 있을까 South Korea's health authorities have shortenedthe interval between primary and booster COVID-19 ...