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In a new development, the British-Swedish company AstraZeneca announced on Wednesday that its vaccine against Covid-19 is 76% effective in preventing symptoms of the virus, based on updated data from the results of a clinical trial that had place in the United States, Peru and Chile.
Therefore, AstraZeneca reduced the effectiveness of its vaccine from 79% before these results were published to 76% today, in a step it took after the US Vaccine Regulatory Authority expressed concern about that the company had used old data to determine the effectiveness of the vaccine. .
On Monday, the leading US authority said AstraZeneca may have used “old” data during its US clinical trials on the Corona vaccine.
“We urge the company to work with the Data and Security Control Board to assess the effectiveness of the data and to ensure that the most accurate, up-to-date and effective data is released as quickly as possible,” he added. .
Several countries previously suspended the use of the AstraZeneca vaccine earlier this month, due to fears that it could cause clots, which in some cases can be fatal.
But the European Medicines Agency confirmed that it was “safe and effective” and its use was resumed in several countries.
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