The chief executive of the biotech behind the first Covid-19 vaccine has said a new formulation is likely to be needed by the middle of next year to protect against the virus as it mutates.
製造首個新冠病毒疫苗的生物技術公司的執行長表示，到明年年中，可能需要一種新的配方，以防止病毒變異。
您已閱讀7%（241字），剩餘93%（3225字）包含更多重要資訊，訂閱以繼續探索完整內容，並享受更多專屬服務。