Some countries in the European Union have temporarily suspended use of the AstraZeneca COVID-19 vaccine as a precautionary measure based on reports of rare blood coagulation disorders in persons who h
Delta變種病毒入侵全球,恐造成新一波疫情,根據一份世界衛生組織(WHO)內部文件,WHO預測,老年人等高風險族群需要每年再接種一劑疫苗加強劑維持防護力。該文件中還指出,明年的疫苗生產數量不會大幅增加,且某些疫苗技術可能被淘汰。《路透社》取得這份將在24日於全球疫苗免疫聯盟(Gavi)進行討論的內