we'll go to jacqueline howard of what we know of the science behind it. >> reporter: the evidence isask can help reduce the risk of spreading the coronavirus and even getting sick. here is one study from the medical journal. some evidence in it suggests that the chance of transmission with not wearing a mask or res -- respirator is 17.4%. when wearing the mask, the chance may fall to 3%. another study in the journal finds that the design and materials of face masks can control respiratory drop lets that could contain viruss. when not wearing a mask, drop lets from a cough can travel 8 feet. with just a bandanna they can travel 3.6 feet. masks work by locking the drob lets that the wearer might spread just from talking or breathing. or coughing or sneezing. health officials also say that wearing a mask can help protect the wearer, too. here is dr. anthony fauci and others on the white house task force. >> there's no doubt that wearing masks protects you and gets you to be protected. >> we need to support mask wearing. when i'm not in uniform, i wear them. they're white. they're effect

jacqueline howard joins us now with more. good morning. what can you tell us. >> reporter: good morning. so we actually just received results, these just came in from an oxford trial in the united kingdom on its vaccine candidate so this, a study was done in more than 1,000 healthy adults ages 18 to 55 and it looked, you know, at how the vaccine really worked, you know, in those subjects. it found that the vaccine did induce an antibody response and a t-cell response, so it means that the vaccine did do what we want it to do, it did elicit and i mun response. we need to see how thatvaccine would work in older results, but it's pressing promises. >> can i ask you what probably sounds like a dumb question but you're the health expert not me, and that is how are they going to know how long a vaccine is going to last and how long it will be effective, right? how long will it take them to know if this vaccine would prove out like an mmr vaccine, kids get it and it will last for their life or a flu vaccine that we have to get every year? >> rig

jacqueline howard, thank you.al coverage continues with brooke baldwin. >>> we will take it from here. i'm brooke baldwin. thank you for being with me. you're watching cnn. and the breaking news on the spread of covid-19 in the united states, the number of americans who have been infected could be as many as 6 to 24 times higher than the total number of reported cases. that is according to the centers for disease control which analyze results from ten different cities and states between march and early may. and the startling statistic comes as the u.s. inches closer and closer to 4 million confirmed cases. and while half of the nation is holding steady or showing a downward trend, the other half

cnn health reporter jacqueline howard joins me. ldren younger than 5 carry much more of the virus actually in their noses, though? >> that's right. what this study found. specifically the study looked at viral rna, genetic material and found children younger than 5 had higher amounts in noses compare with older children and adults. really what the study did here, the study looked at nasal swab samples from covid-19 patients with 145 patients, and 46 of those patients were young children. under the age of 5. some of the patients were ages 5 to 17, and others were adults 18 and older. in those nasal swab samples, that's where the researchers found this high amount of viral rna and it really stood out among the young children, because the older children and the adults appeared to have similar amounts in their nasal swab samples. so that's what the study found. now, what does this mean for transmission? that requires more research, and that's why the study really raises more questions than answers, but one thing the stud sdi say, in fac

cnn health reporter jacqueline howard is standing by with results of this study, and so jacqueline, this is not the first time we have heard that this drug is not effective in treating covid patients, but this is the "new england journal of medicine." what do they say? >> now, this study says what other studies have found as well that hydroxychloroquine appears to not provide a benefit to covid-19 patients. now, what this new study, it involved more than 500 patients and hospitals in brazil who were confirmed to have covid-19 and it separated the patients into three groups. some of the patients received standard care n. they did not receive hydroxychloroquine. some patients received hydroxychloroquine, and some received hydroxychloroquine along with an antibiotic wand treated over the course of seven days, and researchers tracked how they were doing up to 15 days. brooke, by day 15, the researchers said they saw no difference in the recovery of patients who were given hydroxychloroquine, and the patients not given hydroxychloroquine. but what the researchers did notice, some of the patie

here's jacqueline howard. >> reporter: this new cdc study shows that covid symptoms can persist for weeks, even in people that aren't sick enough to be hospitalized, even in younger people with no chonnic conditions. for this study, researchers interviewed nearly 300 covid patients all over the phone. all of the patients showed one symptom. but few were serious enough to need hospitalization. and the interviews were done two or three weeks after the patients tested positive. the patients were asked about their symptoms and their health. here's what the study found. 35% of those patients were not back to their normal health, two to three weeks after testing positive for covid. in other words, they had not fully recovered. just to put this in perspective, the study says more than 90% of outpatients with the flu fully recover within two weeks after testing positive. and here are the ages, now, of the covid patients in the study who are feeling sick. 26% were 18 to 34 at the time. 22%, ages 35-49. and 47% were 50 and over. some of the patients had underlying medical seasons and some did not.

so for that let's go to jacqueline howard live with more. and so jacqueline, let's start with the study out of oxford. what is it showing? >> yeah, well like we said, brooke, the results are exciting but they are preliminary. so this is still early data. for the study out of oxford, that was done on more than a thousand healthy adults ages 18 to 55 and showed this particular vaccine candidate was able to illicit an antibody response within 28 days and t cell responses within 14 days. that means the vaccine did what researchers wanted it to do and is elicited an immune response. so that is good. but, we also have to keep in mind this is early data and there were some side effects, some people experienced pain at the injection site and muscle aches. over the counter pain medication helps with that but it is something to watch as trials continue, we want to see how the vaccine will look in older adults and people with underlying health conditions. so this is still early. but it is exciting. >> and what about, jackie, the results for the pfizer v

jacqueline howard, thank you. cnn special coverage continues with brooke baldwin. >>> we will take it from here. i'm brooke baldwin. thank you for being with me. you're watching cnn. and the breaking news on the spread of covid-19 in the united states, the number of americans who have been infected could be as many as 6 to 24 times higher than the total number of reported cases. that is according to the centers for disease control which analyze results from ten different cities and states between march and early may. and the startling statistic comes as the u.s. inches closer and closer to 4 million confirmed cases. and while half of the nation is holding steady or showing a downward trend, the other half is still seeing an explosion. 27 states have now paused or rolled back their reopenings. hospitals nationwide continue to be pushed to their limits. we're now just 1,000 patients away from the peak that we reached in april. think about that. and when it comes to testing, one major lab said americans could wait as

. >>> i'm jacqueline howard in atlanta. the pandemic is hitting nursing homes particularly hard. experts say better funding and more specialists on the ground are needed to slow the spread of covid. not all nursing homes have the money in the budget for more protective equipment for the caretakers. that can help prevent the spread of the disease and not all have funds for testing. testing helps track who is sick and the u.s. about a quarter of all covid deaths come from nursing homes. >>> so we just spoke about this president trump threatening to defund public schools if they do not reopen this fall. but what about those cities and states that are seeing this sharp rise in cases right now? the head of miami-dade public schools joins us next. >>> president trump is threatening to cut off funding for public school systems that do not reopen in the fall. and the cdc is revising their guidelines for reopening schools after president trump criticized them. so what about schools in the hardest hit states? will they reopen? joining us is the superintendent of miami-dade county public sc

. >> cnn's hit reporter jacqueline howard will explain what we need to know about how children are affected> reporter: victor and abby, here's what we know. so kids appear not to be at a higher risk of covid than the rest of us. but a new study from the american academy of pediatrics journal suggest that their symptoms might be slightly different. this study was on 22 coronavirus children admitted to hospital. it found 41% of them had respiratory symptoms. and some of the cases even went overlooked because they did not meet the then recommended coronavirus testing criteria. here are the numbers, 15 of those kids had a fever. 9 had respiratory symptoms. six reported fatigue. two had seizures, one had a headache and 16 had no known contact with someone who had covid. now, there's still much less to learn here. researchers are still learning more how covid impacts kids who already have underlying health conditions. and covid may be linked to brain swelling. that needs more study. also, you may have heard of this, some children with covid have developed a rare condition called multisystem infla

. >> i'm jacqueline howard in atlanta. people who attended a 4th of july party are being urged to get tested right away and to monitor for symptoms. the health department issued the advisory after party goers tested positive for the virus and were unable to remember who they came into contact with. they showed huge crowds with lots of boats. police reported a 26% higher call volume in contrast to previous gatherings on the 4th. >> outside a hospital in phoenix. the story of the pandemic is a story of stress on the medical system. 89% of all icu beds are in uses. 86% of all hospital beds are in use. ventilator capacity is steadily declining. doctors tell us this system is under stress and for now, there's no end in sight. >> reporter: i'm dianne gallagher in atlanta where georgia governor has reactivated a covid-19 overflow hospital here behind me. he made the decision on friday, which is when the state hit a record number of new cases, nearly 4500. georgia has seen an increase in hospitalizations, deaths and new cases of c

jacqueline howard joins us now with more. good morning. >> reporter: good morning. so we actually just received results, these just came in from an oxford trial in the

. >> i'm jacqueline howard in atlanta. state of alabama is now requiring people to wear masks while in public. the new mandate requires most everyone in public and within 6 feet of a person from another household to wear a face covering. children under 6 years old or one of the few exemptions. the mandate is part of an amended safer at home order issued by republican governor kay ivy. the order now makes alabama the 36th state in the u.s. to require face coverings while in public. >> reporter: i'm sara sidner in pasadena where the pasadena tournament of roses parade has done something they haven't done in 75 years or so since world war ii, they are canceling the rose parade. it is a huge disappointment for this and surrounding communities, because it does bring in millions of dollars, but it also brings in a lot of fun and beauty to the city. it is usually right down this boulevard here. that is not going to happen. why? because organizers say with covid-19 around, they simply cannot guarantee the safety of the volunteers