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Expert: China's vaccines can be highly effective after 2nd dose

CGTN, 31 Jan 2021
For more:
https://www.cgtn.com/video

China's COVID-19 vaccines can be highly effective after the second dose is administered, according to China's top respiratory diseases expert Zhong Nanshan. He explained the test results of two Chinese vaccines and called on people to wear masks even if they are vaccinated.

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