Coronavirus
Pfizer reveals Covid-19 vaccine candidate is 90% effective
![](https://www.petgazette.biz/wp-content/uploads/2020/11/syringe-4544448_1920-e1604924303848-780x470.jpg)
A successful Covid-19 vaccine is a step closer after Pfizer/Biontech revealed its vaccine candidate is 90% effective, according to its first interim analysis.ย ย
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