Pfizer raised its sales forecast for its Covid-19 vaccine by $2bn to $34bn on Tuesday, as higher prices offset a slowdown in demand outside the US.
辉瑞(Pfizer)周二将其新冠疫苗的销售预期上调20亿美元，至340亿美元，原因是价格上涨抵消了美国以外需求放缓的影响。
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