Brazil researchers now say China's Sinovac vaccine is 50% effective — lower than announced earlier

The Butantan Institute had said last week that CoronaVac was 78% effective among volunteers with mild to severe infections, reported the Wall Street Journal.

from Health and Science https://ift.tt/2LGzPQu
https://ift.tt/eA8V8J
https://ift.tt/2zIUzyH