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Natural immunity a stronger, broader and deeper and longer lasting than vaccine immunity and we have data showing how long natural immunity survives and lasts compared to the 3 to 5 to 6 months before you need booster after booster after booster. laura: a good time to ask this, pfizer announced it is submitting international trial data to the fda to the third booster shot. the antibody start to flag after some time, which doctor fauci is thrilled about. >> we are assuming sooner or later we'll have to give boosters. it is not imminent but we are preparing as if it will be imminent. we will be ...

Third dose could be used in effect as a booster. >> that's right, and it's easier to remember, probably, that the tailored vaccine, think of it as almost like a new vaccine series, the cdc is kind of calling or referring to it as the next generation vaccine. it's a different formulation and that's what they're working on, trial data, not what they submitted today. but as you point out, a third dose that could boost most americans' response. it can't come soon enough given what we're seeing around the world. >> particularly a lot of elderly people and other people who have less than full vigoro...

So that's the key. if you want to, again, be protected from death and hospitalization and severe disease, getting vaccinated, even with the delta variant, is still the right pathway. >> so a group of people that cannot be protected by the vaccine are kids under 12. the american academy of pediatrics is saying the fda needs to authorize the vaccines for kids in that age group. based on the trial data available, they say it is time. the fda is asking for more data. here's what the president of the american academy of pediatrics just told my colleague, wolf, yesterday. >> it's really important to...

And more people getting protected here. that should've been something we should've accomplished earlier. >> fewer than 1% of fully vaccinated people getting breakthrough cases. is that what you expected, more or less? what do you think? >> yeah. this is interesting. so we can show what -- this was in san diego county. we can show what was happening there. even if you go back and look at the initial trial data, which was on earlier strains of the virus, they said 95% protective against serious disease. we didn't know how well it would actually protect someone from actually carrying the virus. t...

Geneva [Switzerland], May 27 (ANI): The World Health Organization (WHO) is seeking more data on China's Sinovac Biotech-made COVID-19 vaccine, named CoronaVac, as it weighs whether to authorise a second Chinese vaccine under international pressure to help distribute more shots.