Authorization in the United States after concerns about its use overseas. The company is announcing that the u. S. Trial shows the vaccine is safe and 79 effective against symptomatic covid with no increased risk of blood clots. This comes in a perilous time. Miami beach could be a breeding ground for covid. The citys mayor has aimed a curfew aimed at easing crowds and spring breakers focused on partying and ignoring the pandemic. We are also following a surge of young migrants at the southern border as the white house continues to deny that its at crisis. This hour, ill talk to a texas congressman whos sharing the pictures inside the closed, overcrowded and jaillike facilities where thousands of children are in custody. First nick watt. Nick, astrazeneca is getting ready to seek fda authorization for its Covid Vaccine as cases are on the rise world wide. Whats the latest on that . Reporter well, pamela, for five weeks straight now new case counts have been climbing world wide. Of particular concern, europe and its variants. Europe has led the cdc director here to warn of a possible fourth surge that she says is avoidable. Despite the virus and the variants, despite a curfew and Police Pepper balls, youre watching miami beach this weekend. Spring breakers. It feels in some ways like our city is a tinder right now. You know, were one of the few destinations open, so people are flocking here. We are at a critical point in this pandemic, a fork in the road. Reporter 8 of new cases in florida, were told, are that more contagious variant first found in the u. K. In new jersey, its 9 . The northeast and the upper midwest are beginning to again see a significant rise in cases. A little bit reminiscent of what happened last spring. Reporter but there is some optimism that despite what were seeing in florida, despite us air travel on sunday setting a pandemicera high, that vaccines will win the race against the variants. Were talking about some form of protective immunity and about 55 of the population. Theres enough of a backstop here that i dont think youre going to see a fourth surge. Reporter hes talking about the 80 million plus people who have likely been infected and the 80 million plus who have likely had a vaccine dose. This is the first time the u. S. Vaccinated more than 3 Million People on consecutive days. Reporter three vaccines rolling out already, and astrazeneca just published some latestage u. S. Trial results. Good results, 78. 9 vaccine efficacy at preventing symptomatic zero. Reporter zero evidence it causes blood clots. The astrazenecas vaccine is seen as the worlds vaccine. Its inexpensive and easy to store and transport. Reporter will the baseless fears in europe over clotting still put people out . In this pandemic, messaging matters. They are life or death, says the man once tasked by trump to lead the quest for a vaccine. Many people who probably have died or suffered because the whole situation became so political. Reporter now, at 8 00 a. M. Wednesday morning, the state of arizona is going to throw vaccine eligibility open to anyone and everyone 16 years and older. Only two other states have gone that low so far, alaska and mississippi. Remember, the Biden Administration is saying that within six weeks, every american adult will be at least eligible for a vaccine. Pamela. The white house covid advisor told me yesterday that he thinks by early june, any american who wants to be vaccinated could be vaccinated. Nick watt, thank you so much for bringing us the latest. Lets bring in former cdc director dr. Tom frieden. Lets bring in this astrazeneca news. The company is saying its Coronavirus Vaccine is 100 effective against severe disease. Could this soon be the fourth vaccine approved for emergency use in the u. S. . Weve got with astrazeneca and novavax as additional vaccines that may well get approved in the coming weeks and months. The more options we have, the better off well be. Its very important to be clear that we want to be completely honest, open, transparent with people. And there are going to be studies and sometimes you find a 1 in a million reaction that can be treatable or not treatable and we just have to be very, very open about that. Theres so much hesitancy. Whats happened is those who are eager to get vaccinated are getting vaccinated. Those who are willing will get vaccinated. Then were going to deal with people who are more and more reluctant. The more open and honest we are about the safety of vaccines, the more people will get vaccinated. Astrazeneca is now saying theres no evidence the vaccine causes blood clots. Its significant because the vaccine was temporarily suspended in parts of europe. What checks are in place to give americans confidence in the safety of this shot . Well, there are many systems that track the efficacy and safety of vaccines. Really well have to see with time as millions of people get the vaccine. There may be rare vaccine failures. Thats expected. There may be rare adverse events. For example, about 1 in a quarter of a Million People who get the vaccine have a serious reaction to it. Its treatable. No one has died from it. Theres still more information to come out on the platelet issue. There may be some concern for some people, maybe 1 in 100,000 doses. The key is to be completely open and transparent, share the data with the public and let there be an open decision about whether or not the government allows it to be used and let people make their decision about whether or not to take it. Get this vaccine into doctors offices needs to happen. As vaccine supply becomes more available, particularly with the j j and other vaccines that dont require frozen handling, being able to get this at your doctors office, at a pharmacy, at a popup vaccination center, all of those things need to be available. So you have the vaccine and then you have the concern over variants. Youre seeing the images of spring breakers. Cdc director dr. Rochelle wall l walensky is warning of another surge if we dont take the right actions. What are those right actions . I think, unfortunately, theres likely to be a fourth surge in the u. S. Fortunately, because of vaccination, it will be far less deadly. In fact, we estimate that vaccination has already saved at least 40,000 lives in the u. S. These are really good vaccines and the quicker we get them out, the better. While these are being rolled out with good acceleration, we need to continue to mask up, limit sharing indoor air with people who are not from your household and limit travel. What weve seen with other countries is even with masking and even with closures when people travel and mix, you can see a big surge of infections a couple of weeks later. The cdc says more than 1 in 8 people in the u. S. , thats about 45 Million People, are now fully vaccinated. At what point will enough vaccines have been administered that well be able to stay ahead of these variants . The variants are the wildcard. Theres suggested information coming out of brazil that the variant there, the socalled p1 variant can overwhelm Natural Immunity to the virus. If you had it before, youre well protected against the virus. But with the variant, you may be able to get sick and very sick ag again. We know its a risk. What we need to do is reduce uncontrolled spread. Not only does uncontrolled spread cause avoidable illness, hospitalization and death, but it increases the risk that an even more dangerous variant may emerge that could make the vaccine less effective. Which is why there is such a race to get to herd immunity, so that more dangerous variants dont emerge that could impact those who have been vaccinated. Dr. Tom frieden, thank you so much. Thank you. Turning now to the white house and its response to the migrant surge at the southern border, new images of children in u. S. Custody are adding to the pressure on the president to take action. Lets get more on that from cnn chief Domestic Affairs correspondent jeff zeleny. The white house continues to insist this is not a crisis. Reporter pamela, they have repeatedly for the last several weeks declined to call this Immigration Crisis a crisis. But semantics aside, the numbers are growing, the white house is very well aware of this. In the last month alone, were told, the Border Patrol has arrested more unaccompanied minors than in all of february. Clearly this is fwgrowing even the u. S. Government is telling people, dont come here. A new look tonight inside a crowded detention shelter at the u. S. Border, where these images show children and families waiting as they try to seek asylum from central america. Five pictures released by democratic congressman henry kwa ar offer a glimpse of the Migrant Children crossing from mexico. The white house has not allowed the public to see inside as the administration insists the humanity challenge is not an Immigration Crisis. Children are presenting at our border who are fleeing violence, who are fleeing prosecution, who are fleeing terrible situations is not a crisis. We feel that it is our responsibility to humanely approach this circumstance and make sure they are treated and put in conditions that are safe. Reporter as of sunday, cnn has learned, 822 children were being held in Border Patrol facilities with jaillike conditions for more than ten days, longer than the law allows. As the administration scrambles to find shelter and slow the surge of migrants, tonight press secretary jen psaki telling cnn he wants to increase and exdediet processing at the border. Reporter Homeland Security secretary mayorkas declined to say when the children would be housed in more humane conditions, saying only it would be as soon as possible. We are working around the clock to move children out of the Border Patrol facilities into the care and custody of the department of human health and services that shelters them. Reporter traveling to florida today, Vice PresidentKamala Harris echoed that view, also insisting there is not a border crisis. We were left with a very challenging situation. Weve got to treat this issue in a way that is reflective of our values of americans and do it in a way that is fair and humane, but we have to meet the moment and theres a lot of work going into that. Reporter for biden, the growing number of migrants arriving at the u. S. Doorstep represents one of the Biggest Challenges of his presidency. He said he intends to visit the border. At some point i will, yes. Do you know whats going on in those facilities . I know whats going on in those facilities. Reporter he said he was nearly moved to tears at the sight of a 13yearold girl sobbing in terror. This is a humanity crisis in countries like el salvador, guatemala, mexico, where the violence is so epidemic that these children have to take this harrowing journey to the United States. Reporter republicans have seized on the issue, saying the Biden Administrations policies are a magnet for migrants. The administrations crisis is threatening to overshadow the biden agenda. Tonight white house officials are also working to finalize details of a nearly 3 trillion jobs and infrastructure proposal to present to biden as soon as this week. It would be the next item on the president s agenda. And that agenda item would be a sprawling, massive one, pamela. It would be jobs and infrastructure as well as a separate slate for human infrastructure. That would be Free Community college, universal kindergarten. This is one of the biggest agenda items of this new president. Theyll be working on it over the coming weeks and months. The question is, how would this all be paid for . Through a combination of tax increases for top earners as well as corporate taxes. The president will be talking about it in the next hour as he meets with Senate Democrats in a virtual meeting. Pamela, immigration is now front and center and that could impact so much more of the president s agenda. It certainly could. Jeff zeleny, thank you so much for that. We turn to disturbing news coming into the situation room at this hour. Boulder, colorado, police are on the scene of a possible active shooter at a supermarket. Lets show you some video from moments ago. Police, as you see here, have swarmed the area with Tactical Units and swat teams. Our photojournalist Jeremy Harlan joins me now on the phone from the scene. Bring us up to speed. What are you seeing . Pamela, were definitely seeing an active situation here where dozens of Law Enforcement officers are in Tactical Gear walking in and out of the Grocery Store and on standby. Were roughly about two miles south of the university of colorado boulder campus. Again, very active situation. Just a few minutes ago we heard police over speakerphone tell someone in a car to please sit up straight and turn themselves in. They were surrounded by police. But thats all weve heard at this point. Again, swat team members moving back and forth very fluidly. Earlier we saw video of a shirtless man being detained by Law Enforcement officials and quickly led away. Weve also seen what appears to be firefighters on the top of the roof of the Grocery Store. Again, very fluid situation, dozens of Law Enforcement officers here, agencies from the Boulder Police, the Boulder County sheriff and police from a nearby town. Jeremy, do we know when were going to get more information from police . I know, as you said, its very fluid, its unclear. Theres a lot unclear, right, whether theres still a shooter inside that supermarket or not and so forth. Do we know when police will update everyone . Reporter a spokesperson from the Bloomfield PoliceDepartment Just came up to me and said they are going to speak soon. We do know this is a very active situation, far from being resolved. We hope to get some more information in the next half hour. We will be sure to check in with you then. Im going to bring in phil mudd back into this conversation. What are you thoughts . Just think about this in terms of a couple of phases like a Ripple Effect. The first Ripple Effect piece has to be not only did they pick up a shooter ive been watching some of the coverage online. In a building of that size, that you can clear the building and guarantee that nobody else is in there, think about every storage component in that building, every refrigerated room. It will take a while to clear it. You start to get to secondary questions about who the shooter was and guaranteeing there was nobody else who was a coupon s coconspirator at the location. Right now, youve got to ensure this is the only person if they picked up something already, and that the facility is secure. And we know in these active shooter situations, more times than not it is a single shooter. It is one person. So we dont know if that is the case here in boulder, colorado. I want to bring in Charles Ramsey to get an idea from you, charles, what police are looking for right now . What would be going on with the investigators we see there on the ground . Well, i cant see the video feed that you were showing earlier, but right now apparently, just based on what your reporter said on air, theyre still securing the scene. Theyre going through it. Just as phil mentioned, they have to search every inch of it to make sure they have no more shooters on the premises and also checking the parking lot and so forth, securing it so they can get aid to anyone whos wounded or injured. All those things will be taking place before you have anything in terms of any real information coming from the scene. They may give some preliminary information, but it wont be much. It will be pretty sketchy at this point in time. These scenes are very chaotic in the early stages. So its got to settle down. Number one is clear the scene, make sure you eliminate whatever threat may be there and that that building is totally secure. As were listening to you, were getting a little bit more information coming in f. The university of colorado has a chopper and possible ground crews on the scene in boulder, but have not transported anyone as of yet. What do you think about that, phil . I think a couple things. First, precautionary. You look at the number of cops there and the number of ambulances, you mentioned helicopters. Youve got to have a precautionary measure whether you know there are victims or not to ensure that youre ready to shift them. Remember, when youre going through a building of that complexity, you might have people who are injured, but the first responsibility of those officers is to clear any other shooters out. So you can think about that balance between ensuring you get somebody to a hospital, if there are victims, as quickly as possible, but youve got to be careful about a Law Enforcement officers life if it turns out they turn a corner to try to save somebody and theres another shooter there. The situation has got to be really hot. As youre watching this video, chief ramsey, and swat team members and police are standing around, would this be what you would expect if there was still an active shooter within that Grocery Store . I mean, i dont know where that lot is in relationship to the store itself. Thats an indication that they may have the shooter or at least not feel that theres still an active threat there. I dont know. I cant see the video feed, so i really dont know at this point in time. Whether they think they have a shooter or not, they still have to continue to search that entire building. Phil is absolutely right. In your active