>> while it came later than many expected the world health organization now finally and officially declaring ebola a public health emergency and admitting the virus is spreading faster than they can control it. >> i am declaring the current outbreak of ebola virus disease a public health emergency of international concern. >> this is the largest outbreak of the virus. the state department ordering families of embassy staffers to leave, as this epidemic does continue to spread. in a few minutes i'm going to try to answer some of your questions about the risk for example of getting ebola, and how to keep your family safe. but first, a quick look at how this deadly outbreak got so out of control.

>> the international response to the disease has been a failure. >> blunt words and they were just getting warmed up. >> many people are not cooperating with efforts to contain the disease. >> the house foreign affairs subcommittee, calling an emergency recess hearing on the ebola outbreak. >> there was little action to take to get out in front of this problem. and now we're seeing the consequences. >> the largest ebola outbreak in history. more and more countries involved. when i travelled to these remote villages, i knew the numbers were going to be almost impossible to determine. but officially, nearly 1,000 people dead and twice that number infected. including two americans who were brought back to the united states. not an easy decision for the chief infectious disease doctor for the country. what's so concerning about ebola is that the stakes are so high. a single lapse in standard infection control could be fatal.

>> i want to show you just how quickly an infection can spread. here's a real world example from ebola outbreak in the early 2000s. a woman in uganda didn't know she was sick with ebola, she was in close contact with six people. her baby and father-in-law got sick. the baby got his grandmother sick, and she had contact with two more people as well. the father-in-law had close contact with 12 people out of that his brother and cousin both got sick. the brother then had close contact with four more people, and the cousin had close contact with five more people, including another brother who used his blanket and also got sick. >> if you leave behind even a single burning ember, it's like a forest fire, it flairs back up. >> that's why breaking the chain is essential to stopping the epidemic. >> we do know how to stop ebola. meticulous case finding, isolation, and contact trace

management. >> what about treatment for those who get sick. >> reporter: congressional leaders grilled the doctor specifically about the experimental drug. it had never been used on a human before, just animals. representative bass wanted to know, why did just two americans with ebola receive the serum, with so many africans so sick? >> i would like you to talk about that that there's concern that we have access to this and are not providing that access. >> reporter: dr. frieden took a pass on that one. >> i would need to refer you to the national institutes of health, which would be the lead on developing new treatments and vaccines against ebola. >> ken isaacs testified on behalf of samaritan's purse where they were working when they got inspected. he disclosed that the national institutes of health knew about the experimental treatment from the start and testified it had worked for brantly and writebol.

>> that medicine was administered after it was brought to us by the nih people. there was improvement. seemed to have gotten better. >> one point of agreement aside from brantly and writebol ebola can make its way to the united states through others. >> there wilt be people who go from these three countries and are here with symptoms. >> thursday's hearing was to make sure we are ready. now, the reason people are so alarmed about this particular outbreak is because it's never before spread so widely, it was typically confined to these remote areas of central africa, now it's within a stone's throw of an international airport. it's on the move. i hear from social media, wanting the truth about what this all means from you at home. we heard the cdc director saying, it's inevitable that additional cases of ebola will come to the united states.

but he also said it's not going to lead to an outbreak here. it's important. why is that? the united states hospitals are more equipped to isolate and provide better treatment. what we have in place is it a stark contrast to what i saw reporting on this case in guinea. it's also what david mckinney witnessed this week in sierra leone. >> taking incredible care to combat an unprecedented outbreak. >> gloves. ebola can lead to death with just one drop of infected fluids. >> that's why we take every possible precaution to prevent that. >> already, dozens of doctors and nurses have died in this outbreak. still, dr. kruger said he had to come. >> this is where they need us. there's a really big lack of resources. at the moment the truth is if it wasn't here there would be nothing. >> they are losing the battle.

ebola hit four countries, the number of infections continue to rise. this outbreak is out of control. >> in the last two weeks, they've doubled their capacity here for confirmed ebola patients, and they're doing all they can to help those who are sick, but they're absolutely at capacity here. >> the level of effort that it is right now, will it stop this disease? >> no, to be clear, no. and it's really difficult. we are -- we don't know where we're staying. it's frustrating for us, we don't have the capacity to go everywhere. >> here they do what they can. in the high risk zone, this woman calls out for help. she has ebola, so does her son. ebola is so deadly, it's killing our citizens, killing our country. her husband and son died of the disease. 70% of confirmed cases here will die too.

>> she's confident -- >> to talk to her we must stand a few feet away. the strict protocols protect us. the cruelty is, they isolate her. still, she believes her 12-year-old daughter will make it, and so will she. we are feeling much better she says, we are strong and we're going to fight. >> what happens when you actually beat this disease? >> that's the real highlight of everything that we do here. everybody comes to watch the person come out of isolation, it really i think it will continue what we do here. >> david mckenzie, sierra leone. >> thanks so much. incredible reporting, very proud of david. up next, we have an incredible look inside an emergency room in gaza.

the doctors and nurses who struggled to take care of victims of the seemingly never ending israeli/palestinian conflict. stay with us. ñzóó

eyes on the middle east and gaza today. even if peace does take hold. the damage from the latest fighting is tough to repair. something's lost, can never be regained. i've been in war zone hospitals all over the world. and the stories of patients and the health care teams that risk their lives to save them are extraordinary. karl penhaul took us inside one of them and showed us the struggle to keep up with the stream of desperation that kept rolling in the door. >> dead on arrival. the horror, civilians and medics, at breaking point. >> we feel exhausted. we feel depressed.

>> no time to rest. it's a scramble to rescue survivors. soldiers told us not to film this casualty, a hint perhaps he was a militant fighter. most on the operating table are clearly noncom patents. their patient is a 23-year-old female, and they showed me on the x-rays, she has a basic fracture on her leg. they say that was caused by a rocket blast. the surgeons focus, the blink of the patient's eye. the beep of vital signs. the doctor is sick of it. sick he tells me of stitching bodies mutilated by shrapnel. sick of war. >> we see 61 injured patients. we don't have enough for this

patient. what about if we receive more? >> down the hallway surgeons patch up a toddler. the rest of his family is dead. bone and brain surgeons do skin graft, they can't transfer him to a plastic surgeon. medicine and supplies are running low. >> if the war is one more week or more than this we don't have sutu suture enough for the injured. >> the fight for gaza has become a dirty war. no sanctuary for the innocent. >> the future is very danger. no place in gaza, no even one square meter is safe in gaza. >> dr. massry is afraid he like others could be killed any time. he carries his i.d. everywhere. >> you're preparing for death as

well? >> yes, we are preparing ourself for death. >> men dazed with amputated limbs, a child with head trauma battling to get up. many medics tell me only faith can keep them on their feet. >> we got to give the power to work. we work sometimes 20 hours continuous. >> but even the call of god drowned out by the agony. carl penhaul, cnn, gaza. >> that was a couple weeks ago, but it's a perspective. a medical perspective that i hope doesn't get lost in all of this, we do know the hospitals that you just saw is still up and running. thanks to carl penhaul. up next, we're shifting gears. many people thought this was never going to happen in their lifetimes, a federal law introduced in congress to legalize some types of marijuana.

you've seen the labels, gluten free, but what does that really mean? first things first, gluten is a protein found in wheat and other grains. and pasta and bread. for the 3 million americans with celiac disease it can be a problem. >> it is a disease of inflammation of the intestines, it can produce intestinal like symptoms, upset stomach -- >> believe it or not, up until this week, there were no regulations behind the label. starting this week, the fda will only allow foods to be labelled gluten free if they have less 20 parts per million of glad toen. that's what people with celiac disease can endure.

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we're back with "sgmd." it used to be a fringe issue. congress is looking at proposals to loosened federal laws against medical marijuana. one new bill would legalize a treatment i've been reporting on quite a bit. it's cannabis oil to treat seizures. let's talk about marijuana and your brain. it's a rather complicated process, so let's start off with what's familiar to you. thc. the chemical in weed that gets you high. you feel lightheaded, you feel giddy, sometimes relaxed. marijuana, you can smoke it, you

can eat it in an extract of food. you can inhale it with a vapor can or consume it in an oil form. it's especially good for little kids who are taking it as a medicine. no matter the method, thc goes through your blood stream and into your brain. there it's going to latch on to these special receptors, when they're stimulated to release dopamine. it sends signals to various nerve cells all around your body and makes the user feel high. not all cannabis is going to get you stoned. it contains another chemical known as cbd. that's cannabadiol. marijuana plants that have low thc and high cbd can work really well as a medicine. they can treat things like epilepsy. it works because the chemical can quiet excessive electrical and chemical activity in the brain. i know this 3-year-old girl who went from having 300 seizures per week to two per month. after her parents gave her cannabis with high levels of

cbd. when it comes to marijuana, there's some 500 different chemical compounds. all these compounds work together. it's something known as the entourage effect. it's important, because you can't just take a chemical out of marijuana and make a medicine, you need the whole plant. especially when it comes to using pot instead of pills. joining me from washington is congressman scott perry of pennsylvania who introduced what he called the charlotte's web medical hand pact. it would take some of these strains that are used to treat seizures and make them legal under federal law. thanks for joining us, welcome to the program. >> thank you very much, great to be here. >> let me just start by asking, why are you doing this? what prompted this? >> well, i had some families come into the office, just set up an office visit and they came in to see me, i heard their story, and i'll tell you, i think when i went back to my staff and said, we have to fix this, they kind of looked at me like, medical marijuana? i said, yeah, the federal

government is in the way of treatment for these little kids, i feel like i have -- this is my duty, this is a duty to fix this, so i said, figure a way out. let's figure a way to do this since last october. we finally think we've arrived at a solution. >> one of the things i point out as well, and you know as well, congressman, there are states out there that do have federal marijuana laws, but not at the federal level. you run into a crazy situation where people are taking the medicine in one state, but couldn't take it back to their home states. they could be arrested for drug trafficking. that's a real concern for these people. what you're proposing would help eliminate this as well? >> the families i spoke with, i live in pennsylvania, they said they were considering moving at least a portion of the family, of course, the afflicted child and one parent to colorado so that they could avail themselves to the cbd, literally making them medical refugees. i thought, this is america, that's absurd, why would we encourage the breakup of the

family, put these people in peril for something that doesn't make you high? what we wanted to do is remove the federal barrier so that they could avail themselves to the treatment. and there would be no excuse for the states to stay, we're not going to do this. if there's no federal prohibition they were we could regulate it, just like most states regulate alcohol, same thing. >> i'm curious, congressman -- and i'm not a plit tiolitician t me ask this. politically, how challenging was this for you. i wonder if this issue is just not a winning issue, it could be a losing issue for a politician, but not a winning issue, did you consider that? >> i'll tell you. if you were to ask me five years ago, three years ago, you're going to be the champion for cbd, for medical marijuana, i would have said you're crazy.

i've never been for recreational drug use or extracurricular drug use but i will tell you, i really didn't think about whether it's politically viable. if this is problematic for me. i looked at these families, i said, this is my job, ran for this office, we have a duty, the federal government is standing in the way of their treatment, we need to break down this barrier and allow them to treat their children, keep their family together, in a way, i think that's why my staff looked at me, like are you crazy? i feel like this is important, and we need to be doing this. >> it can work when nothing else has worked. it's amazing. thanks again. appreciate it. >> thank you very much. when we come back, i've been fascinated by how we have responded to all this news about ebola, the fear, the near hysteria at times, where does this all come from? and why do so many people share it? daily game of "what if's". what if my abdominal pain and cramps end our night before it even starts? what if i eat the wrong thing?

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the number one excuse for not exercising is, i don't have time. but a lot of people tell me that exercise is boring. i get it. sometimes i'll focus on a specific problem during a run, let my mind mull it over. i also enjoy using technology, to see if i'm getting better at my runs or just older and slower. a san francisco runner does something i hadn't seen before, she uses the gps on her nike running app to draw aliens from the atari game space invaders. one morning she decided to run slimer from "ghostbusters." check out her first attempt at running a corgi. pretty impressive. i would be remiss if i told you a lot of the drawings she showed us we can't show you on television. but the point is this. add something extra to your exercise and be far more likely to do it on a regular basis. this is kathleen. setting up the perfect wedding day begins with arthritis pain and two pills. afternoon arrives and feeling good,

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before we go, we talked a lot about ebola this week, and there's been a lot of fear, i saw tweets that wondered allowed if ebola was going to wipe us out or if this was the big one.

no doubt referring to a terrible menacing pandemic. the answer is no to both those things by the bay, but it is easy to see where the fear comes from. like in the movie "outbreak" a terrifying disease comes from some remote part of the world, takes hold and threatens all of mankind. that story line has become such a part of our collective consciousness, we almost expect it, even if there is no science, no rationale, no logic to back that up. make no mistake, there is a virus out there that kills a lot of people, it's known for stealing away babies, pregnant women and people who have finished a lifetime of work and are ready to enjoy a lifetime of retirement. those are the people who are likely to succumb to this illness. the symptoms are headache, body aches, excessive fatigue, and tens of thousands of people die from it in the united states alone. what i'm describing is the common flu, not ebola, something not so scary, right? because we understand it. information is power, and also remember, we do have a vaccine

for the flu. one day we may have a pandemic that plays out like a movie. thankfully, it's not ebola, and it's not now. hope that helps ease your mind a little bit. "new day sunday" continues right now christi paul and victor blackwell. -- captions by vitac -- www.vitac.com good morning at 8:00. so good to have you with us on thissunday morning. tony stewart involved in a deadly accident on a dirt track in upstate new york. stewart hit a driver, who had exited his car during the race, in other words the driver had gotten out of his car, he was standing on the track, and we're getting some new information about it all this morning. >> just a short time ago we obtained video of the crash. we have to warn you, what you're about to see is disturbing. stewart and that driver, they collided during the ra