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2 Companies Say Their Vaccines Are 95% Effective. What Does That Mean?

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By Carl Zimmer via NYT Health https://ift.tt/2Kt3KuT
2 Companies Say Their Vaccines Are 95% Effective. What Does That Mean? 2 Companies Say Their Vaccines Are 95% Effective. What Does That Mean? Reviewed by zaira on November 21, 2020 Rating: 5

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