adalja:? dr. adalja: it seems the stronger the reactions it is hard to make a 1:1 comparison.he clinical trial data, the side effects are not considered to be very severe. there are people who get the vaccine who have no side effects. it is hard to know exactly where a 12-15-year-old will fall. but that is something that the cbc panel will look at. children are not likely to be the major spreaders, so that will be the calculation that the cdc and fda do. that is important because vaccines have a benefit and let you have to look at each specific age group. lisa: when you talk about the risk-benefit every day, there is a transitioning going on. when do health officials say enough high-risk individuals have been vaccinated, that the covid pandemic can be downgraded to a bad flu and we can go about our lives? dr. adalja: what would have to happen is we have to get closer to 40% of the u.s. population vaccinated. that is where we saw precipitant declines in israel, which is a much more highly vaccinated country. they still have not reached herd immunity either, by their test positi

amesh adalja of johns hopkins, senior scholar. just to read that line from this essay again, "fully vaccinated persons should not be tested unless symptomatic. corporations are going to work this out in the coming weeks and months. tom: they will work it out day today. it is like every other pandemic, every other viral illness, there is a sequence. every day, we are doing it. this weekend, there were 50 people in a room of all different ages getting their first or their second shot. it is a day after day and we will sort it out. i agree with you. right now, it is not sorted out. jonathon: to get the new guidance from the cdc, it takes time. countries have had to take time to work out what they need to do. lisa: there is a lot of confusion because there is a lot of disagreement even health professionals. you have a doctor coming on and saying it is important to remain vigilant and you have dr. adalja saying it is -- saying we are moving into a new phase. this committee is part of what is stemming the confusion. this is new. this is

adalja: i don't look at it in terms of doses per day. on because that was a function on how well the vaccine rollout was reaching the people wanting to be vaccinated. we used prioritization. not everyone was the same priority to get the vaccine and we gave a lot of the vaccines early on to high risk individuals in order to flatten the curve and preserve hospital capacity. that group of the population is very heavily vaccinated. if you look at people above 60 or above 65, .3% of them are fully vaccinated and that should remove the ability of the virus to cause hospitalizations and death. now i would say we are dealing with a mop up, trying to get transmission down but we are out of the point where this is a public of emergency stressing hospitals. as long as we vaccinate as much as possible, that is great, but i think we have achieved the first goal of the virus. jon: as you said, this is no longer a public health emergency. any reason to believe they could become one in the future? dr. adalja: in the united states, it would be difficult

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adalja joins us. york says no, new york is not ready for this yet. >> this is a great piece of guidance from the cdc that really reflects the value of these extraordinary vaccines and it's completely based on the science and biology of transmission and we've been -- some of us have been calling for the cdc to be more bold, to be more aggressive for opening what vaccinated people could do safely and this is what we wanted from the cdc and it shows people this vaccine has a lot of value to them, something that can a allow you to reclaim prepandemic life that you put on hold and i think it's a great piece guidance and i hope more states follow suit and more people are able to get vaccinated because they see this as a motivation to be vaccinated. maria: for sure, dr. adalja, what do we know, though, about the emergency use authorization and its long-term impact? i think lost in all of this has been the fact that, you know, taking this vaccine is recommended but it's still emergency use, it's not a regular

amesh adalja, a senior scholar at the johns hopkins center for health security at the bloomberg schoolsburgh. doctor, thanks for joining us. let's talk about those new cdc guidelines for camp, specifically camps that were -- where everyone has been vaccinated can go full capacity and maskless. however, it's a bit more complicated when it comes to camps where not everyone has gotten a shot. are these some of the challenges that we'll be facing in our schools come september? >> i definitely think that when you have a population that is partly vaccinated and another part is not vaccinated, it's going to be challenging to be able to separate those people out and come up with different policies. but i think policy has to really reflect the fact that these vaccines are extremely effective, that they reduce your ability to get -- to contract this infection, maybe you no longer a threat. the guidance has to reflect that if you're fully vaccinated, this is the pre-pandemic life for you. and when you're unvaccinated, that there are still going to be some areas that are high risk and that you mig

amesh adalja is here, an infectious disease expert and senior fellow at johns hopkins center for healthning, others are saying it's too soon. you're the expert. what do you sunshine. >> i think we've got at least be 0% of the u.s. -- 30% of the u.s. population fully vaccinated and some population of immunity and you have a change in the hospitals in terms of hospital capacity concerns, icu beds, people who are getting severely ill and i think that gives you flexibility to start to pull back on mitigation measures and do it safely. as more people get vaccinated it becomes easier. i think we're looking good as we go into the summer with covid-19 being controlled to a much greater degree in this country. arthel: so 243 million americans have received at least one dose of the covid vac seen. is that enough to reach herd immunity. and what do you say to people who are hesitant to getting the vaccine. >> it's important to remember that before we get to herd i'm hewn at this, we have a significant number of population immunized. when israel got to 40% fully vaccinated they a pree precipits dec

adalja is. but apparently the nurses' union is unhappy with the guidance on this in most places. what's happening in santa monica where you are? >> that's correct, we're in santa monica. here's where it gets interesting before we get to the nurses. i visited this area throughout the pandemic over the months, and this is an area where masks were mandated, where people were told they had to wear masks, but throughout the pandemic the different visits i made to this area, people never wore masks. there is a lot of foot traffic. this is an outdoor area where there is a lot of space. our crew, we're all fully vaccinated and we keep that six feet of distance. but just as an example, the rules can be one thing but the behavior of the public can be quite different. we've been here all day and we haven't seen -- you know, 90% of people in this area aren't wearing masks. getting into the nurses now, the largest union, the nurses united union, have spoken against these guidelines, their argument that less than 40% of americans 16 or older of the u.s. population has been fully vaccinated. th

doctor amesh adalja says it's still best to get the vaccine. these cases are very rare and very mild. when you look at the overall benefit of the vaccine benefit outweighs this risk of myocarditis. even if it is established af a risk. again, that was markie. martin reporting for us tonight. schools with mask mandates and good ventilation are safer for your students. that's according to a new report from the cdc. >> which tracks safety measures at elementary schools. the agency found schools with improved ventilation and mask requirements for staff had 37% fewer covid cases in those schools which did not have those issues. the cdc suggests opening windows are turning on fans at schools that can't afford a new ventilation system. the first participants in pfizer's new study of a covid-19 vaccine booster got their shots today. the trial's primary objective is to look at the safety of the vaccines when they are coe administered as well as follow-up. 6 6 months after the vaccination. the trial include 600 adults over the age of 65 who got the vaccin