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Have. you hear that. you hear about this 11-month-old with covid who didn't have a place to go in houston. had to be air lifted to another hospital. what do parents need to understand at this moment, especially as schools are starting to reopen? >> what parents need to understand about this situation is a little bit of, yes, we're still learning about this, but overall i still feel that two things are true at once. on one hand, the individual risk to a child remains quite low, very low. but the population risk to kids is high. so even if there are very, very occasional, rare moments where a ch...

Compared to an extended or long interval, ten weeks apart, which as you know many people in the uk have had and we found two main thing is, firstly antibody levels fell significantly during the ten week long interval after the first dose. but t cell responses were maintained. and on average, people who had the long interval dosing ended up with higher antibody responses after the second dose compared to those with the short interval, including variants of concern. it's important to say that these are at a population level not individual, and there's a lot of variability in immune response and ...

Across five centres in england and compared how two different arms of immune response, antibodies and t cells, responded in people given the pfizer vaccine according to a short course, so average three weeks apart compared to an extended or long interval, ten weeks apart, which as you know many people in the uk have had and we found two main thing is, firstly antibody levels fell significantly during the ten week long interval after the first dose. but t cell responses were maintained. and on average, people who had the long interval dosing ended up with higher antibody responses after the sec...

Organization's chief scientist explained why it was important to monitor how vaccines perform against it. >> the delta variant is well on its way to becoming the dominant variant globally because of its significantly increased transmissibility. this is something that we are watching very carefully and documenting, and we now have a special expert group that's been set up to exactly track the performance of vaccines and their effectiveness when used at the population level in relation to the variants. >> and u.s. health experts are stressing the need for vaccinations as that delta variant sprea...

Persons groups ranks as an important risk factors and in the narco study we know investigate to what extent had group strength of thought or a risk factor for these persons in middle aged and younger person so where you could the participants in the a tranche of twenty to sixty nine years of the narcos study but why did you test the handgrip strength and not the strength of the experts what we are interested in is to the strengths of the muscle in general and not on a population level they had group strength shows a very high correlation with the over of muscle strength so that the prime reaso...