medical correspondent elizabeth cohen. this new study is focused on the pfizer vaccine. what does it have to say? >> that's right. i just got off the phone with the lead researcher in south africa on this study. and he said, look, what our study showed is that, first of all, small study, and it was in a lab, but this suggests that this is an escape variant. this is a variant that knows how to some extent outwit the vaccine, but he said he feels pretty confident that if you are fully vaccinated, you will -- that this vaccine will -- that the vaccines will help protect against severe disease. and that's what we look for vaccines to do. he said significant protection. that's what he expects from the vaccine against this variant. now will it protect you from getting infected and a little bit sick? he is not as confident on that. he doesn't think that's necessarily going to happen. but he does think that even with this variant that people who are fully vaccinated will get significant protection. it's interesting, jake, because