disease, that s what dr. alex seegal, the south african researcher told me yesterday, he believes two doses will give significant protection against severe disease, against ending up in the hospital or ending up dead. and pfizer also says that a third dose may give more robust protection, may be able to protect you from infection in and of itself. so this is this is overall really good news, it seems that just two doses will protect you against ending up in the hospital or in the morgue and that a third dose is even better. but i will say this is all lab research at this point. we need to know more and they re doing those studies and we expect to know more even just in the coming days. brianna? look, the fact that you could avoid it altogether with a booster shot or this third dose, you know, or avoid passing it on to someone who can t get a vaccination as of yet, small children, for instance, elizabeth, thank you so much. so we have a cnn exclusive