Thread: Coronavirus
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Old 11-08-2021, 19:32   #6929
pip08456
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Re: Coronavirus
Quote:
Originally Posted by jfman View Post
Pfizer are certainly working on a version of their vaccine to increase efficacy against Delta.

https://cdn.pfizer.com/pfizercom/202...nal_7.8.21.pdf
I should imagine the other vaccine producers are doing the same.
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