China considering mixing Covid vaccines to boost protection rate
The currently available vaccines "don't have very high rates of protection", Gao Fu, the director of the Chinese Centers for Disease Control and Prevention, told a conference in the Chinese city of Chengdu on Saturday.
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The currently available vaccines "don't have very high rates of protection", Gao Fu, the director of the Chinese Centers for Disease Control and Prevention, told a conference in the Chinese city of Chengdu on Saturday. 
