The report

http://www.youtube.com/watch?v=NJFkx4Y6llI

This is a link of the introduction of H5N1 and H7N9 viruses. In this video,it mainly tells us that at the beginning of 2003, WHO received the case that human can be affected by H5N1 influenza cases and speculated that this virus can mutate, so that it can lead to human infection. Meanwhile, H7N9 virus, formally caused the diseases between the birds, but now between people. The most severe thing is this virus can cause people death. Experts think that the virus is composed of two to three avian influenza viruses,these invisible viruses, transferred form chicken, ducks, birds, and pigs, attached people seriously...