@JHWeissmann Covid vaccines and booster were authorized one at a time for the past 1.5 years. How is this different?
@在过去的1.5年里，JHWeissmann新冠病毒疫苗和助推器被授权一次接种一种。这有什么不同？
@JHWeissmann Covid vaccines and booster were authorized one at a time for the past 1.5 years. How is this different?
@在过去的1.5年里，JHWeissmann新冠病毒疫苗和助推器被授权一次接种一种。这有什么不同？