what is the name of this new killer avian influenza strain? "a," h2n1, "b" h6n2, "c" h7n9. go to cnn.com/fareed for more of the gps challenge and follow us on twitter and facebook. go to itunes.com/fareed if you miss a show or a special. >>> this week's book of the week is a good one. "this explains everything." deep, beautiful, elegant theories of how the world works. john brockman asks some of the world's best minds for their favorite explanations of anything. the result is a collection that reads like the best ted talks ever. it's an absolute pleasure to read. now, for the last look. good signs sometimes takes a very long time. it was 11 years after nasa was founded that we landed on the moon. the human genome project took 13 years. it's been almost 50 years since the particle was first proposed. and it still hasn't been conclusively proven. but australia's home to the world's longest running lab experiment. it's on the verge of a break through of sorts. 86 years ago a professor at the university of queensland initiated this pitch drop experiment wanting to show that som

. >>> in 1997, the h5n1 strain of avian influenza first infected humans causing global concern. 2003, there have been nearly 600 human infections from that strain. then in 2009, we had the swine flu pandemic,h1n1, now there's a new bird flu claiming lives and authorities are watching it closely and it brings me to my question of the week. what is the name of this new killer avian influenza strain. a, h 2 n 1, b, h 6 n 2, c, h 7 n 9. d, h 9 n 7. stay tuned, we'll tell you the correct answer. go to cnn.com/fareed for more of the challenge and follow us on twitter and face book, and go to itunes.com/fareed if you ever miss a show or a special. this week's book of the week is a good one. "this explains everything" deep, beautiful, and elegant series of how the world works, the publisher of the edge.org asked some of the world's best minds for their favorite explanations of anything. the result is a collection that reads like the best tech talks ever. it's an absolute pleasure to read. now for the last look. good science sometimes takes a long time. it was 11 years after nasa was fou

officials in beijing confirm that a 4 year old boy tested positive for the latest strain of avian influenza. they say he shows no symptoms but they're keeping him under observation. a 7 year old girl was the first case. her parents sell live poultry. three more cases appeared over the weekend. two why in beijing and now hunan province has one. the virus is hard to tackle. >> translator: chickens don't develop flu symptoms from h7n9. they look healthy from the outside. so it's hard to tell how far the epidemic has spread. >> he says chinese authorities don't seem to be taking appropriate measures, including culling the infected birds. he warns that if authorities can't contain the virus in birds, it may mutate and be able to transfer between humans. >>> they're working against a backdrop of fresh problems at the crippled nuclear plant. they started proceedings on monday. they asked tokyo electric power officials for details about the plant's clean up. the inspector's plan to examine the plant itself then will happen in draft assessment. tepco has discovered that tons of radioactive water has

avian influenza. how prepared will we be? let's get back to that marine or sailor that's blown up? in previous conflicts from the time you were grievously injured to the time you were eventually immediate vaked back to the states to a tertiary care facility such as a tertiary care medical facility such as walter re d or bethesda or san diego or brooke army in texas or a va medical center, that time of injury to time of immediate vak was 45 to 60 days. ladies and gentlemen, today if you are a warrior and you are blown up or griefously injured, on average from the time you are grievously injured to the time you arrive in my icu in bethesda is 3 days. that capability is provided to us by on screen care with unparalleled first responder action that can save the live, tourniquet therapy, clotting agents, understanding, robust immediatevac capibility, and then a continuing continuum to germany and back to the states in the c130's, the flying icu's which the air force has, which you are safer in the air at 30,000 feet than you are in 90 percent of the icu's in this country. they do not lo

it goes by h-7 n-9 avian influenza. two people from shanghai have died from it.ther in a different city is in critical condition. the victims all had initial symptoms of fever and coughing that then developed into severe pneumonia and difficulty breathing. investigators haven't figured out how they caught the virus. but so far, it doesn't seem to be very contagious.at least among humans. that's good news because right now there's no vaccine against the virus. >> we know that stress can lead to high blood pressure and even a stroke. but on the flip side.could a belly laugh a day possibly keep a heart attack away? whoever said laughter is the best medicine was on to something. because scientists are finding that laughter is great for your health. new studies suggest that a good chuckle lowers blood pressure causing less stress on the heart. and it may also have an effect on immune response making you less susceptible to colds and the flu. in fact, research shows that 15 minutes a day of laughter, real deep belly laughter, is as important for your heart as 30 minute

. >> reporter: scientists say the new avian virus differs in several ways from the h5n1 influenza.scientists say more than 370 people have died from that virus between 2003 and 2013. h5n1 killed millions of birds. also, it stopped the spread of the virus by cutting many more. scientists point out that unlike capable of infecting birds without causing symptoms. this has made it hard to detect outbreaks. an expert on infectious diseases from the university of tokyo m professor kawaoka, says part of the genetic sequence has mutated. this has made the virus more infectious to humans. >> we have not been exposed to h7n9 viruses, so we're not immune to these viruses, and that is one of the reasons why a percentage of people who were infected with this virus can develop severe disease. >> reporter: w.h.o. officials stress because there's no evidence of human-to-human transmission, the situation is a long way from becoming a pandemic. but kawaoka pointed out that there's a possibility the structure of the virus could further change. >> by looking at sequences, one can tell these viruses ca

. >> reporter: scientists say the new avian virus differs in several ways from the h 7 n 1 influenza. officials say that more than 370 people have died from that virus wean 2003 and 2013. h 5 n 1 killed millions of birds. also it has stopped the spread of the virus. stine tests point out that unlike h5n1 it appears capable of infecting without other symptoms. an expert on infectious diseases from the university of tokyo says part of the genetic sequence has knew tated. this has made the virus more infectious to humans. >> translator: we have not been exposed to h 7 n 9 viruses. so we're not immune to these viruses. and that is one of the reason why percentage of the people who got ineffected can develop severe disease. >> reporter: who officials stress because there's no evidence of human who human transmission it is a long way from becoming a pandemic. but he points out that there's a possible the structure of the virus could further change. >> and by looking at sequences, one can tell these viruses can replicate well in ma'am alien speegsys, including humans. and it is possible, the