Passage 4 they come to see.He says this happens because people bring their viruses with them. "Human respiratory viruses are the number one source of death in habituated chimpanzees and gorillas.In chimpanzees,half of the deaths are caused by human respiratory viruses. Mrithi,a 20-year-old male western lowland gorilla. Mr.Walsh wants apes that come near tourists to receive vaccine against human diseases such as measles. He and his scientific team also call for better enforcement of laws against harming the severely endangered western lowland gorilla.In addition, they are asking for better protection oftheir decreasing habitat. But the gorillas are still defenseless to a disease like Ebola that kills both humans and our wild relatives. I'm Anna Matteo. This story is based on a report by VOA reporter Steve Baragona.It was adapted by Anna Matteo for Learning English. 515Passage 4 5 / 5 they come to see. He says this happens because people bring their viruses with them. "Human respiratory viruses are the number one source of death in habituated chimpanzees and gorillas. In chimpanzees, half of the deaths are caused by human respiratory viruses." Mr. Walsh wants apes that come near tourists to receive vaccine against human diseases such as measles. He and his scientific team also call for better enforcement of laws against harming the severely endangered western lowland gorilla. In addition, they are asking for better protection of their decreasing habitat. But the gorillas are still defenseless to a disease like Ebola that kills both humans and our wild relatives. I'm Anna Matteo. This story is based on a report by VOA reporter Steve Baragona. It was adapted by Anna Matteo for Learning English. Mrithi, a 20-year-old male western lowland gorilla