What is Going on with the Astra-Zeneca Vaccine’s Strange Efficacy Results?

Photo by CDC on Unsplash

Okay, so, we have preliminary efficacy results on the Astra-Zeneca vaccine…and scientists are baffled.

You have probably seen both 70% and 90% figures circulating, and there’s a reason for that.

The trials tried two different regimens. One was two full doses of the vaccine, the other was a half dose followed by a…

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Jennifer R. Povey

Jennifer R. Povey

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