A federal study with support from Duluth, Minn., researchers has tracked the first two COVID-19 vaccines approved in the U.S. and found that they were 90% effective in real-world conditions and prevented asymptomatic infections.
A federal study with support from Duluth, Minn., researchers has tracked the first two COVID-19 vaccines approved in the U.S. and found that they were 90% effective in real-world conditions and prevented asymptomatic infections.
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