waves that are deadly. that s why, fareed, it s so important that the world come together and further scale up the mrna technologies. this is our best insurance portfolio against both more dangerous variants which could evade vaccines and against problems with production with many of the other vaccine types. devi, what does this mean, though, for the you know, the m mythical herd immunity? because it seems like even in places like britain, israel, where you have very high vaccination rates, the delta makes it harder for there to be a herd immunity phenomenon if it ever is achieved. yeah, exactly. because it s more transmissible, the threshold we have to cross to have transmission stopped gets higher and higher. some estimate as much as 98% of