U.S. CDC says most COVID-19 infections spread by people without sympto… stocking 0 48 2020.11.23 11:10 https://youtu.be/9KAzIxDPp7o + 4 美 CDC "코로나19 70%는 무증상 상태 전파" U.S. disease control authorities say more than half of COVID-19 infections could be spread by people without ...