(CNN)When the British-Swedish drugmaker AstraZeneca announced on Monday that its experimental coronavirus vaccine is 70% effective on average, the world exhaled a collective sigh of relief and stocks rallied. Another vaccine with promising results had arrived. But a lack of clarity surrounding several aspects of the data from the AstraZeneca vaccine trials have raised some eyebrows in the scientific community, potentially setting back the timing for the vaccine to be authorized in Europe and the US. AstraZeneca said on Monday that study participants in the UK had been given two different courses of the vaccine. The drugmaker, which developed the vaccine with the University of Oxford, did not however, at the time, explain why they used two different dosing regimens or why the size of one group was significantly smaller than the other. In one group, 2,741 participants received a half-dose of the vaccine and then a full dose at least a month later. This group was 90% protected against Covid-19. Read More In the second group, 8,895 participants received a full dose followed by another full dose at least a month later. This group was only 62% protected. That’s why AstraZeneca says their vaccine is 70% effective, on average…. Read full this story
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AstraZeneca hopes the world can focus on its positive vaccine news. But experts fear a lack of transparency has clouded that have 323 words, post on edition.cnn.com at November 26, 2020. This is cached page on USA Breaking News. If you want remove this page, please contact us.
