AstraZeneca Vaccine ‘Highly Effective in Preventing COVID-19’
November 23, 2020
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AstraZeneca announced Monday morning its COVID-19 vaccine, AZD1222, given in the United Kingdom and Brazil showed 90% effectiveness in preventing the virus after half a dose and then a full dose one month later. It is only 62% effective if given two full doses a month apart.
The trial had 23,000 volunteers.