Moderna COVID-19 vaccine may be better than Pfizer against Delta variant; breakthrough cases rise with time<blockquote>Moderna新冠肺炎疫苗对抗德尔塔变异毒株可能比辉瑞更好;突破性案例随着时间的推移而增加</blockquote>
Tesla stock was up 2% in early trading following an upgrade to ‘buy’ from Jefferies with a target of $850 from the previous $700.<blockquote>特斯拉股价在早盘交易中上涨 2%,此前杰富瑞将其评级上调至 “买入 ”,目标价从之前的 700 美元上调至 850 美元。</blockquote>