Vaccine makers should start studies on tweaked vaccines “sooner rather than later”, the US regulator has urged, as it said they could avoid lengthy trials for a new approval if they need to adapt Covid-19 shots.
美国监管机构敦促,疫苗制造商应“尽早”开始对改良疫苗展开研究。它还表示,疫苗制造商如果需要调整新型冠状病毒肺炎(COVID-19,即2019冠状病毒病)疫苗,可以不用为获得新的批准而进行漫长的试验。
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