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.
美國監管機構敦促,疫苗制造商應“盡早”開始對改良疫苗展開研究。它還表示,疫苗制造商如果需要調整新型冠狀病毒肺炎(COVID-19,即2019冠狀病毒病)疫苗,可以不用為獲得新的批準而進行漫長的試驗。
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