AstraZeneca Covid-19 Vaccine Had Manufacturing Error

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The vaccine from AstraZeneca and the University of Oxford could be at risk, due to  an error in the manufacture  of the possible cure against Covid-19, which caused questions about the preliminary results to increase.

A statement from the pharmaceutical company described the error days after AstraZeneca and the University of Oxford reported that the vaccine had been highly effective, although it did not mention why some study participants did not receive as much vaccine in the first of two injections as was I expected.

Surprisingly, the group of volunteers who got one low dose seemed to be much better protected than the volunteers who got two doses of this vaccine. 

In the low-dose group, AstraZeneca said the vaccine appeared to be 90 percent effective, while the two-dose group appeared to be 62 percent effective, however the way in which the vaccines were Results were reported by companies led to prompt questions from experts.

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