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Scientific American

2021-02-24, 12:20
Experts Answer the Biggest COVID Vaccine Questions


What does “95 percent effective” mean? Should you get vaccinated if you have had COVID? Is there a best vaccine? 



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https://www.scientificamerican.com/artic...uestions1/
www.chinaphonearena.com > Off The Wall > Tech & Science > [Sci-Am] Experts Answer the Biggest COVID Vaccine Questions