Their findings could be good news for what scientists predict about the risk of a killer flu, and they could also help researchers find better flu vaccines, the researchers said.The teams were looking at the puzzling characteristics of two kinds of bird flu that keep popping up in people: the H5N1 and H7N9 viruses. And, oddly, while H5N1 has hit young people and children especially hard, H7N9 seems to attack older people. H5N1 has infected 856 people since 2003 and killed 452 of them, WHO reports. H7N9 has infected 452 people and killed 124 of them, according to the Center for Infectious Disease Research and Policy at the University of Minnesota. The team at the University of Arizona and the University of California Los Angeles studied the numbers, examining the reports of each case, who was affected and how severely. They found an almost startling link with birth year. People born before 1968 are less likely to die or be made severely ill by H5N1.[听力文本资源]1. [听力文本资源] What may affect one’s risk of catching flu according to the news? [听力文本资源]A) Immunity.B) Characters.C) Lifestyles.D) Birth years. 2. [听力文本资源] What is the significance of the findings? [听力文本资源]A) They may tell scientists which flu would spread worldwide.B) They may tell people how to protect themselves from bird flu.C) They can help researchers find better flu vaccines. D) They can help people choose the right kind of vaccines.3. [听力文本资源] What are their findings mainly based on？ [听力文本资源]A) The characteristics of the people with flu.B) The reports of the cases of bird flu. C) The birth years of the people affected by flu.D) The numbers of the bird flu cases in 2003.

[听力文本资源]People’s birth years can affect their risk of catching certain flu—probably because their first case of flu somehow sets their immune system, researchers reported. Their findings could be good news for what scientists predict about the risk of a killer flu, and they could also help researchers find better flu vaccines, the researchers said. The teams were looking at the puzzling characteristics of two kinds of bird flu that keep popping up in people: the H5N1 and H7N9 viruses. And, oddly, while H5N1 has hit young people and children especially hard, H7N9 seems to attack older people. H5N1 has infected 856 people since 2003 and killed 452 of them, WHO reports. H7N9 has infected 452 people and killed 124 of them, according to the Center for Infectious Disease Research and Policy at the University of Minnesota. The team at the University of Arizona and the University of California Los Angeles studied the numbers, examining the reports of each case, who was affected and how severely. They found an almost startling link with birth year. People born before 1968 are less likely to die or be made severely ill by H5N1.[听力文本资源]1. [听力文本资源] What may affect one’s risk of catching flu according to the news? [听力文本资源]A)  Immunity.B)  Characters.C)  Lifestyles.D)  Birth years. 2. [听力文本资源] What is the significance of the findings? [听力文本资源]A)  They may tell scientists which flu would spread worldwide.B)  They may tell people how to protect themselves from bird flu.C)  They can help researchers find better flu vaccines. D)  They can help people choose the right kind of vaccines.3. [听力文本资源] What are their findings mainly based on？ [听力文本资源]A)  The characteristics of the people with flu.B)  The reports of the cases of bird flu. C)  The birth years of the people affected by flu.D)  The numbers of the bird flu cases in 2003.