determine whether its coronavirus vaccine is safe for infants and young children. this is so important. it's important for school. it's important for getting and keeping the country back to normal. the first participants have already been vaccinated. the plan is to ultimately enroll nearly 7,000 children in the u.s. and canada between the ages of 6 months and 11 years old. >> also the white house drawing up plans to increase the supply of vaccines to emerging hot spots. the vaccination rate in the u.s. is accelerating. now standing at an average 26.4 million shots reported a day. president biden meantime heading to pennsylvania. a bit later. his first stop on the help is here tour where he'll promote the benefits of the coronavirus b relief bill. let's bring in dr. sanjay gupta. obviously, very important because when we talk about getting everyone, all adult americans vaccinated by may 1st or july 1st, we're not even beginning to talk about kids yet. that's why this trial matters so much. >> yeah, it definitely does. we know that kids are far less likely to get sick or require hospitalization. but sometimes that happens. and there's still this concern that kids can be a source of spread of the virus. the vaccines, the data is increasingly showing these vaccines cannot only help keep from from getting sick but decreasing that spread. this will be important data to have. let me show you what's happening. pfizer, as you may know, they finished enrollment for people age 12 to 15 in january. so we're going to have some of that data coming up over the next few months. this is the moderna trial vaccine information on the screen. so between the ages of 6 months to 11 years, close to 7,000 children and 3,000 adolescents up to age 17. what's interesting here is what they are looking at basically is, obviously, is this safe in people this young? but also trying to figure out the right dosing. we know that these are, obviously, typically smaller people. but of the -- do the children metabolize this differently in some way. you want to figure out the dosing. they'll collect this sort of information. what we're hearing from a time table standpoint is that possibly even by fall you may have an authorized vaccine for high school students. depends on how much data they collect and what it shows. but this is rapidly progressing. >> it is really encouraging. also just want to -- help us understand what's happening with the astrazeneca vaccine which they haven't applied for emergency use authorization even here in the u.s. yet, but this is the dominant vaccine that was being used in europe. a number of countries there now halting vaccinations over some concerns about blood clots. a very small number, and as i understand it, sanjay, it hasn't been shown those clots were directly caused by the vaccine. >> right. no, it absolutely has not been shown that that cause and effect. if you look at a general population of people and see what percentage develop problems with clotting and look at the vaccine population, the vaccine population is about the same rate as the sort of normal background level of people developing clotting. so there's really no clear evidence. people's antennas are up. we're releasing a new vaccine around the world so you really want to have these very robust safety monitoring. anybody that has any problem, report it. that's what's happening here. so of some 17 million vaccines that have been administered, around 30 people have had these blood clotting issues. the question is this just an association that we're finding? or is there direct cause and effect here? the world health organization has weighed in on this. they are pretty clear on the fact they don't think this is really due to the vaccine. these blood clotting problems. there's no evidence these are caused by the vaccine. it's important vaccination campaigns continue to save lives and stem severe disease from the virus. the european medical agency is going to meet on thursday. that's going to be a really important meeting. we'll keep an eye on it. hopefully they'll be conclusive in what they say. all evidence points to the fact that this doesn't seem to be related and the vaccination campaigns continue, but we'll see. that's why these meetings happen. the reason the vaccine has not been authorized in the united states as of yet is because there's an independent body called the data monitoring safety board that's saying we now have enough data to present to the fda. we haven't gotten to that point yet. it's not to say there's concerns about the safety but there's not enough data collected in this country. >> obviously, it's a major concern in europe because their cases are surging. and to take one of the main vaccines offline is problematic. we want your take on one other statistic we saw overnight. i want to get this right. the red cross is reporting in their blood donations, 20%, 1 out of 5? >> up to 20 or 21%. >> 21% of blood donations, they've found coronavirus antibodies in the blood. you can see how that number has gone up consistently since last july which means 1 out of 5 people donating blood. these are people who haven't received the vaccine. it turns out it's telling us what, that 1 out of 5 people have had the virus? >> yeah. yeah, so that's basically what it's saying. so this is important, as you mentioned, unvaccinated people. they'd ask people at the time of their blood donations have you been vaccinated or not? they looked at the data from people who have not been vaccinated and 20% have these antibodies. this has long been a question. what percentage of the people have actually been exposed to this virus and have antibodies? we've never had a good answer for that because we don't have adequate testing. i could talk the entire hour about that whole issue. nevertheless, so it's always been sort of trying to guess a little bit as to what percentage. you do hear varying numbers. the cdc said the number could be as high as 25%. ihme says 20%. regardless, you -- the reason this is important is if 20% of the country already has antibodies you add in the 11% now vaccinated. what is your overall sort of immunity level? closer to one-third. so that's potentially good news in this quest for herd immunity. we've got to see how this plays out, but i would look at that study and say, it's interesting. it means probably a lot more exposure than people have realized. but we can use that to build towards herd immunity. >> definitely interesting. fascinating as well. especially how quickly it jumped. >> we adore you, as you know, sanjay gupta. it's not just us. sometimes you venture beyond the little cnn box. including -- i know -- >> and he still takes our calls, most of the time. >> so you went to visit another friend last night. just want to play a little clip from that. >> okay. >> i think there's three types. there are people who have no idea. they don't ever watch television. they just don't know. the second type are people who will actually seek you out because you're on television, which i always thought was strange. i think i'm really good at what i do, but i don't think i'm any better because i'm on television. somehow that's the perception. and then the third type which i would be, i get that you're on television. i want you thinking of nothing else but me when you're taking care of me. >> that's why i go to dr. phil for all my marriage counseling. >> i did have a brain question. you'd be the guy i call. >> i appreciate that, yes. keep me on your speed dial. it was fun. he asked a funny question. how do patients respond? i've been doing this bifurcated career for 20 years now. you get all sorts of different s responses from parents during these last couple of decades. it was a fun interview. >> we don't mine if you need to moonlight a little. you deserve it. sanjay, thank you for being with us this morning. >> thank you. of course. joining us now, political analyst margaret talev, managing editor of axios. great to see you and especially this morning. i'm learning a little more about what the last several weeks have been like for you on a personal level, and they have been challenging, to put it mildly because you had coronavirus. before we get into the politics of what's happening right now in the country, we are just hoping that you can walk us through your experience because i think it's so telling for so many of us to hear it firsthand. >> well, thanks, erica. it's great to be here. please forgive my raspy voice. this is the best i've sounded in a month. it was exactly a month ago that i found out that i was positive for coronavirus. it was an accidental discovery. i got a pcr test from work before an interview and needless to say the interview never happened. i was completely asymptomatic. the symptoms came the next day. my partner john was in another state when i found out. i called him. he got tested. we both had it. thank god my daughter did not. and after about two days of, you know, waiting to see what would happen, i descended in an absolute intense sickness. i have viral pneumonia right now. i had a fever of 102 for two weeks solid. i have a great doctor. i have insurance. i have all of the benefits that you would want to help get care, and even so, i was incredibly sick. i have asthma. so a major pre-existing condition, a concern for respiratory illness. i had to get i.v. therapy. i was on antivirals, antibiotics, steroids, vitamins, baby aspirin against clotting. we threw the book at this thing and i still was a zombie for two weeks and had a very -- even in week three, a very difficult recovery. if not for all of the early medical intervention and testing, i'm not sure i'd be here at all. i had a really bad case. thank god for the support of my work, my family, my friends, my doctors. everything we've learned over the course of the last year. but guess what? i took the precautions. i wear a mask when i go out. we wash our hands. try to keep social distance. all of that has probably staved off getting it for 11 months. but this thing is not over. and i know we're talking about getting vaccinated. recovery trying to return to normal. i can't wait for all those things to happen. we're not there yet, and this is still a deadly virus. >> i can't tell you how glad i am to see you because i know how tough this has been. and it's a lesson. it just is. and i wonder now when you are covering this, you know, when you hear the cdc director rochelle walensky warn we've got to keep our guard up for a little while longer, i wonder how that might color your views on this going forward. >> it's a great point because that's 100% been my experience. look, i bought into this a year ago. i've been very engaged in polling and public research on how people are experiencing coronavirus. no one had to convince me the vaccine is a great thing, that we all have to take precautions until then. but i did think, okay, we've learned how to deal with this. all you have to do is wear a mask and keep your distance from people and wash your hands and you can do whatever. that's really not true. the doctors have been telling us that but you trick yourself into believing that you understand how this thing works. and the truth is all those things are really important and they reduce your exposure. but they don't remove your exposure. and my experience is that we are so close now. so close. many of our parents, friends who have pre-existing conditions have been able to get the vaccine but for folks who can't yet, you'll be able to in a month or two. just be really careful between now and then. and for folks who don't believe this is real or say, oh, it's just like getting a cold. like, it is for a lot of people. but for me it wasn't. and you don't know. you may not get a very strong case but you can pass it to someone else and they could have a very bad case. it also just made me understand how lucky i am and how lucky many people tor have good doctors, medical insurance, companies that allow you to take time off to get better. for so many people, none of that is the experience. to have what i experienced and underlying health and economic concerns and no idea where you safety net is going to come from. we need regular testing. we need to support our friends and neighbors much more. and i thought i got it. i get it at a whole new level now. >> one of the ways to support our friends and neighbors going forward is to get vaccinated which is the message the administration is trying to get out there. one of the things they are finding is there's hesitancy particularly among republicans -- excuse me, republican men. nearly half of republican men don't plan to get the vaccine. president biden is talking about the former president to get him to join in on the vaccination campaign. so for he's resisted. he was vaccinated himself but one scant message in february but other than that, no promotion of the vaccine. this is what president biden says about that. >> they say the thing that has more impact than anything trump would say to the maga folks is what the local doctor, what the local preachers, what the local people in the community say. so i urge -- i urge all local docs and ministers and priests to talk about why. why it's important to get that vaccine. >> i mean, i do wonder if it may not be essential, but it certainly couldn't hurt to get the former president on board with the message, right? >> yeah, and you know, we heard dr. fauci say that over the weekend that he thinks it would be very helpful if trump would do that. i think what you're seeing going on here with president biden is twofold. there is a political aspect to this. look at where president biden is going just this week. a couple of really important swing states that were pivotal in last year's election and will be pivotal again in midterms and next presidential. pennsylvania and georgia. biden doesn't want to make the messaging about president trump. how only trump can save the day. but if you set the politics aside, beyond that, donald trump has been a pretty unlere liable partner about this. he got the vaccine but didn't tell anybody for two months. he's allowed a lot of mixed messaging to go on. for republicans in america, particularly republican men, there is a distrust, a disconnect or just kind of diminishment of an understanding of how vital the vaccine is, not just to your own health but to protecting the people around you, your loved ones in your community and what biden is looking at is polling that says in addition to donald trump, not republicans do trust their doctors, their preachers and local officials. and so we're seeing like, francis collins of nih and dr. fauci do work with evangelical leaders. biden doing some of this messaging. looks like he said out loud what some of his internal conversations are which is, we can't count on trump to be our partner on this. it's not like president bush or president clinton coming out and leading a campaign with us. counting on donald trump for your vaccination strategy is a different strategic proposition. >> margaret talev, rest up. chicken soup. get well. we're so glad to see you. we're so sorry you had to go through this but we're glad to see you coming out the other side. >> thanks. it's great to be back. two arrests now in the fbi's investigation into the death of a capitol police officer. but no murder charges. the former deputy director of the fbi joins us next. i'm a verizon engineer. we built our 5g nationwide so millions of people could do what they love in verizon 5g quality. and in parts of many cities, we have ultra wideband, the fastest 5g in the world. this is 5g built right. only from verizon. how great is it that we get to tell everybody how liberty mutual customizes your car insurance so you only pay for what you need? i mean it... uh-oh, sorry... oh... what? i'm an emu! no, buddy! only pay for what you need. ♪ liberty, liberty, liberty, liberty. ♪ developing this morning, two men arrested for allegedly assaulting a u.s. capitol police officer, brian sicknick, during the storming of the capitol on january 6th. sicknick died a day later. neither of the men arrested are charged with his murder. so joining us now, andrew mccabe, senior law enforcement analyst, great to see you. assaulting a capitol police officer is a serious crime. if convicted would carry serious jailtime. it's notable they're not charged with murder. why? >> well, john, no question that the prosecutors and agents and task force members that are investigating all of these crimes desperately want to hold somebody responsible for officer sicknick's death. they are not able to do that right now. likely because, first, we are not 100% sure what the cause of death was. we haven't seen a public release anyway of the medical examiner's report. they're probably still waiting for that. once we find out what that cause is they'll need to determine exactly who was responsible for it. so there's still a lot of work to be done there with a chaotic kind of long-term attack like we saw on january 6th. that's going to be hard to do. what they can do right now is charge these two men, tanios and khater in a strong case of assault which is proved by the video that i'm sure you saw yesterday of those two men essentially committing the assault. >> we look, as you point out, we don't have the information from the medical examiner yet. at least not publicly. when do you think we can expect that? i think that's something a lot of people are looking at trying to better understand what did lead specifically to officer sicknick's death. what else do we know there? >> you know, erica, usually it takes a few weeks. we generally, in the business, would think about at least a month to get a coroner's report or medical examiner's report back on a homicide. if there's more challenging investigative and determative work to be done like intoxicant levels and all sorts of chemical tests to determine what might have affected the -- or caused the death, those things can make the analysis take a bit longer. the laboratory work takes a longer time and the report needs to be written and released. so it is getting on the long side for this one. but i wouldn't throw in the towel just yet. i'm sure we'll see a conclusive medical examiner's report at some point in the near future. >> one of the outstanding questions until yesterday was when would the people be charged in connection with what happened with officer sicknick. another question open, when will authorities find the person who planted the pipe bombs at the republican and democratic national headquarters. we've seen this surveillance video where at least the novice eye like mine, it's hard to identify who exactly that person is. but give us some insight about why they are having problems finding this person and what fears about what might happen in the interim. >> sure. so the fact that the bureau is essentially crowd sourcing the identification of the bomber by releasing all the video that they have in these very distinctive elements from the video like the brand and style of sneaker that the individual is wearing, things that might jump out to someone who actually knows him, tells us that they don't really have any viable leads about who that individual in the video is right now. if they had those sort of leads they'd be much less likely to reach out to the public for help. if you know who you are looking for, what you want to do at that point is conduct a covert investigation. you want to conduct extensive physical surveillance. you want to maybe send inf informants or undercover agents to bump up against that person. collect as much information and evidence about not just what they did but what they might be doing in the future and who they might be working with before you do something overt like an arrest and bring someone