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CHICAGO, Sept 30 AstraZeneca Plc’s Covid-19 vaccine demonstrated 74 per cent efficacy at preventing symptomatic disease, a figure that increased to 83.5 per cent in people aged 65 and older, according to long-awaited results of the company’s US clinical trial published on Wednesday. Overall.
AstraZeneca Plc's Covid-19 vaccine demonstrated 74 percent efficacy at preventing symptomatic disease, a figure that increased to 83.5 percent in people aged 65 and older, according to long-awaited results of the company's US clinical trial published on Wednesday.
Overall efficacy of 74% was lower than the interim 79% figure reported by the British drugmaker in March, a result AstraZeneca revised days later to 76% after a rare public rebuke from health officials