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4-year-olds that they did not generate an antibody response similar to 16 to 25-year-olds but that doesn't mean it wasn't effective. we'll probably see that in the pfizer data. there are other ways to show vaccine effectiveness. for example, does it increase the risk of infections in a certain age group? i think we'll see that data from pfizer coming out soon. as for safety, we saw in both age groups, 6 to 2 months and 2 to 4 years old that there were no had adverse side effects. the most common side effects were fever and chills, which is very similar from most childhood vaccines. i think peo...

Found wasn't effective. do you think this could potentially delay the vaccine for 2 to 5-year-olds? >> you know, i think out of necessity, erica, it's going to make the time frame for when we get an emergency use authorization for children that young, it will. it won't be likely until the second quarter of 2022, and we were hoping it would be in the first quarter, but at least from what pfizer is saying, by the time they get all of the necessary data and go through all of the procedure of getting an emergency use authorization, unfortunately it's not going to be until the second quarter. but y...

Contain potential illegal immigrants from entering this country. and our current president did not abide by that and now is going to be going back to it. in the meantime there has been a stretch of time where immigrants have been flowing over our border almost 2 million immigrants have come into this country in the past year alone. what do you think this will do by reenacting this policy? >> first of all, mayorkas making the statement that ended the program because it wasn't effective. i don't know what color sky is in his world. if you look at the data it's one of the most effective policies ...

It before and as we're learning like many other viruses, we need three doses, maybe more, but at least for now, three doses to constitute a full immunity for at least a year. >> when they put the brakes on, did more information and more data get clarified that, okay, there's no need for a break here, let's get ahead with everybody get a booster? >> yeah, i think it's two things. one, there was a compelling set of data from pfizer, 10,000 patients, average age as you 53 years. people who were completely healthy as well as those with chronic conditions, it showed the booster wasn't effective, ba...

♪ there will be an update in the federal guidelines for coronavirus vaccine booster shots tomorrow. the fda is expected to authorize coronavirus boosters for all adults nationwide as soon as tomorrow. currently, a cdc recommended booster shots -- 65 and older and adults over 18 who are at a greater risk of infection because of underlying conditions or increased risk of exposure. 14 states and new york city have already expanded access to booster shots beyond the federal guidelines. public health officials in california earlier this month sent a letter to local health care and vaccine provide...