Avian+Flu+WB

Avian flu is a type of influenza that has adapted to birds. Avian flu has recently become a large concern, as an outbreak of H5N1 early in the 90's killed hundreds of people all over the world. Avian Flu has not yet become a direct threat, because it is not yet capable of human to human transmission. However, there are a few cases in which human to human transmit were considered a possibility. However, these cases were not confirmed, and did not transmit beyond two people, much less threaten an entire population. Avian Flu has only killed about 200 people worldwide, but has been portrayed as being far more deadly than it really is. The United States has been working on a vaccine for Avian Flu, should it evolve to be able to spread from human to human.