Covid-19 vaccine from Pfizer has passed safety checks and is 95% effective against the virus the firm announced today.The pharmaceutical giant and its partner BioNTech first published interim results last week which showed the jab could prevent more than 90% of people developing coronavirus.
This data was based on the first 94 volunteers to develop Covid-19.But further figures released on today are based on the first 170 cases of the virus in the clinical trial - and show a higher efficacy rate.The vaccine has been tested on 43,500 people in six countries and no safety concerns have been raised.
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