jessie goodwin, said there needs to be a national effective system for distributing and monitoring the vaccine. >> it will be chaos. we may have multiple vaccines and we may require two doses. they are going to need to know, when they get the vaccine and when they come back for the second dose. we have a big challenge. >> a challenge that goodman understands first hand. >> our vaccine team acted immediately along with cdc. >> he was the fda's chief scientist in 2009 and navigated the agency's response to the h1-n1 flu pandemic. >> do you feel that the vaccine has been driven by science or politics? >> i feel the vaccine has been driven by science and the public health need. but whether we will leave it in the hand of the experts to carefully consider the data and make decisions, had that's the next critical step. the absolute most important thing is transparency is not over promising. and not under mining the scientists, in particular the fda, i think if we do that, and we are transpoarent about the results the results will speak for themselves. >> pfizer tells cbs news, it made change