he heads the department of neuro surgery at cedar sinai medical center in los angeles. >> it can grow within a matter of weeks. if from the time of diagnosis to death if one does not have any treatment that time can be as short as two to three months. >> hopefully -- >> even with the best standard of care no one beats this. most patients die within 12 to 15 months of diagnosis. layla was diagnosed with a left frontal blastoma, grade four. >> yeah. so it's devastating but i have my two young kids and that i think about so that was it so i'm like i'm going to do it for my kids, fight for my kids. >> layla was admitted to the hospital march 7th. the very next day a surgeon, a member of dr. black's team, took out as much of the tumor as he could. then came six weeks of radiation therapy and chemotherapy. after that, something new. an experimental treatment, a vaccine against cancer. >> one of the strongest defenses we have against disease is our immune system. one of the first things that a brain tumor has to do in order to survive in the brain is that it has to make itself invisible to t

christopher wheeler is a research scientist at the neuro surgical institute at cedar sinai. >> we take blood from the patient and change them into from kind of nondescript blood cells into highly specific immune cells which are really good at jump-starting the immune system. >> it migrates to the lymph nodes and activates t cells. they initiate a calculated response from the body's immune system killing both the tumor cells and cancer stem cells. >> what we've learned about cancer is it really doesn't behave like a human colony. cancer behaves more like a termite colony. you have the queen termite that keeps making the offspring much like trying to get rid of termites in your house. you want to kill the queen cell or the queen termite or the cancer stem cell. >> in the next stage of dr. black's study half the patients are receiving the vaccine. half are getting a placebo. in addition to standard chemotherapy and radiation. neither layla nor the doctors know what group she's in. but she's optimistic. >> i can't get down or else, you know, i'll go down, too. so i have to stay confident.

doctor wheeler is a doctor at cedars-sinai. >> we take blood from the patient and change them into highly specific immune cells that are really good add, again, jump starting the patient's tumor. >> they're injected into the patient's armpit and it mieg greats. the t-cells relocate to the glioblastoma and initiate a calculated response from the body's immune system, killing both the stew more cells and cancer stem chells. >> what e wefr oob learned is it doesn't behave like a human colony. cancer behaves more like a termite colony. you have the queen termite keeps making-off spring. you want to kill the queen termite or cancer stem cell. >> reporter: in the next stay half the patients are getting vaccine. half are getting the placebo in addition to chemotherapy and radiation. nayer this leila or the doctors know which group she's in, but she's optimistic. >> i can't, you know, get down or else, you know, i'll go down too. so i have to stay positive. i feel really good, thank god. i really do. yeah. >> it's worth pointing out that dr. black's advantage seen isn't the only wunl out there an

he heads the department of neuro surgery at cedar sinai medical center in los angeles. >> it can grower

. >>> researchers at cedars-sinai found high doses of vitamin b3 can fight super bug viruses. scientists say the vitamin helps white blood cells battle staph infections, including antibiotic resistant ones. experts caution more study is necessary. they say people should not start taking vitamin b3 to treat infections. >>> a lack of sleep can abnew risk factor for aggressive breast cancer. a new study shows a link between two little -- too little sleep and more aggressive tumors. they also found lack of sleep increases chances the cancers would come back. >>> researchers in new zealand say smoking marijuana as a teenager can lead to lower intelligence as an adult. the study noted a sharp drop in iq points in those adults who smoked pot weekly before the age of 18. this subjects that heavy marijuana use is dangerous for the developing teenage brain. a study released in june shows 23% of high school students in the united states smoke pat. >> we controlled for the amount of alcohol we used over the same years. we also controlled for or adjusted for the amount of hard drug use. it