실수가 행운을 가져왔다?…아스트라제네카 백신효능에 의심 증폭<br /><br />Disquiet is growing over the way that Oxford university and AstraZeneca have handled the early readout from trials of their Covid-19 vaccine.<br />But since unveiling the preliminary results which showed up to 90-percent efficacy, AstraZeneca has acknowledged a key mistake in the vaccine dosage received by some study participants, adding to questions about whether the vaccine's efficacy will hold up under additional testing.<br />AstraZeneca admitted that researchers gave only half a dose by mistake,... and the fact that it worked was "serendipity."<br />Its effectiveness could be as low as 62 percent.<br />Also, all the participants were younger than 55, raising doubts about whether it'll work for older people.<br />
