CNN Newsroom With Ana Cabrera
Shot may give people protection. the company did not provide the data to back it up. the cdc and fda responding with not so fast informal we'll address the confusion from. but here is what's clear. vaccines work. and they are saving lives. need proof? take what we learned out of maryland. 127 people died there from covid in june. none of them were vaccinated. cnn's elizabeth cohen joins us. what are we learning about why pfizer put out this statement on boosters? >> i'm going to start with, actually, why people think it's crazy that pfizer put out this statement on boosters. it really is the n...