Chinese companies are developing 5 experimental Covid-19 vaccines

Since the initial outbreak of Covid-19 in Wuhan, China, the country's authorities have largely succeeded in keeping a lid on the virus through tough measures. As Beijing pushes hard to develop a Covid-19 vaccine, CNN's Ivan Watson reports on why some health experts are urging caution.

source https://www.cnn.com/videos/world/2020/11/18/china-coronavirus-covid-19-experimental-vaccines-development-watson-pkg-intl-ldn-vpx.cnn