Coronavirus cases in the UK are dropping and whether it's due to the vaccine rollout or something else, scientists are confused. CNN's Phil Black reports.
원문출처 : https://www.cnn.com/videos/world/2021/07/29/uk-coronavirus-cases-phil-black-pkg-intl-ldn-vpx.cnn
원문출처 : https://www.cnn.com/videos/world/2021/07/29/uk-coronavirus-cases-phil-black-pkg-intl-ldn-vpx.cnn