Some of the mutations have been associated with higher transmissibility.

其中一些突变可能会有更高传染性。

He added that there is no " evidence of person-to-person transmissibility" .

他补充说, 没有人与人之间传播" 证据" 。

And what role are they playing in terms of increased transmissibility that we're seeing with this Delta variant?

德尔塔变异毒株遗传率升高，它们在其中又起到了什么作用？

Certainly, as evidence has gathered with this new variant, it does seem like there might be an increased transmissibility.

，着相关证据累积，我们发现这一病毒新变种似乎确实有可能增加传染性。

Back in 2004, a team at the Harvard School of Public Health had modelled the transmissibility patterns of the 1918 virus, more precisely they calculated its reproductive number, 'R', in relation to its serial interval, 'v'.

早在2004年，哈佛大学公共卫生学院一个团队就建立了1918年病毒传播模式模型，他们更精确地计算了病毒繁殖数量R与序列间隔v之间关系。