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AstraZeneca vaccine safe and effective in US, Chile, Peru trials
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The Covid-19 vaccine developed by Oxford University and AstraZeneca was 79 percent effective in preventing symptomatic illness a large trial in the United States, Chile and Peru, the company said on Monday, paving the way for it to apply for US approval.

The vaccine was 100 percent effective against severe or critical disease and hospitalisation and was safe, the drugmaker said on Monday, releasing results of the late-stage human trial study of more than 32,000 volunteers across all age groups...

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