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Doses are necessary for the broad swath of population. maybe if you just had a solid organ transplant. if you're that individual, you might need a fourth shot, but for the rest of us, no evidence of benefit. so clarity of messaging here is going to be key. i do love what i'm seeing from say, senator sanders and the senate when it comes to n -- making n95s more available to more american households. i know the president, this is a big priority of the president's as well, because andrea, this type of availability of resources, high-quality masking, not only will it provide a short-term benefit f...

You said about education, what katty said about resistance to common sense, the misinformation problem, if you had a private audience with joe biden and said, mr. president, this is what you got to do right now, what would it be? what would you have him say? >> he can say some of this on tuesday just 30 seconds here, i think we have to have a different vocabulary. they are now going to emphasize the purpose of vaccination. we talked about that. i think we need to coopt tactics from the greatest public health messaging campaign we've ever seen the anti-smoking campaign. as a lung doc you see lu...

For everybody to be that there is no vaccine that exists in this world, prior to covid, through this pandemic, that will prevent a positive test and symptoms, for flu, for covid-19, i say this as a lung doc. these vaccines, moving forward, the success they should be measured against is to keep you away from the hospital and without severe ammonia, any other measurement, will never attain success at scale across the world. we're chasing our tail. that is the measure of success, and we have not been able to message on that definition because we haven't been messaging on the nuance of what the im...

Respect dr. collins, that's confusing messaging. that doesn't make sense. we should be mandating proof of vaccination before you board a flight in the united states or a test before youn board that flight. the same policy should apply. can i just say more broadly for all viewers out there -- >> absolutely. >> it's important to get this out rtthere. and i say that as a pulmonologist. in two weeks' time, three weeks' time, pfizer, moderna, other companies i'm sure are going to come out withi' headlines to sa vaccine effectiveness has declined to x percentage at preventing a positive test. and th...

We need proper context. this is the right move. areas where there's high viral transmission, mask up even if fully vaccinated to prevent this transmission from occurring. this is a slight pivot, not reversal. >> tell me about the delta variant. are we seeing viral loads for people with symptomatic covid and delta variant, are they just put it in perspective from the original i guess alpha, b 117 and original covid. >> well, so chuck, what we are noticing, say this as a lung doc, it is stickier. for all of the viewers wondering what does contagious mean, it has modifications to outer portion of...