@juli_bg_bs Antigenically closer right?
https://twitter.com/firefoxx66...
@juli_bg_bs抗原性更接近，对吗？
https://twitter.com/firefoxx66...
@juli_bg_bs Antigenically closer right?
https://twitter.com/firefoxx66...
@juli_bg_bs抗原性更接近，对吗？
https://twitter.com/firefoxx66...