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.
制造首个新冠病毒疫苗的生物技术公司的首席执行官表示，到明年年中，可能需要一种新的配方，以防止病毒变异。
您已阅读7%（241字），剩余93%（3225字）包含更多重要信息，订阅以继续探索完整内容，并享受更多专属服务。