The death of a 39-year-old man in China from bird flu (H5N1) has renewed concerns that the virus will eventually cause a pandemic. The man died in Shenzhen, a southern city of China. The Wall Street Journalreports that H5N1 has infected 575 people and killed 338 since. This is a very high death rate for a flu virus. The good news is so far the disease has not spread very easily from person-to-person. Scientists are very concerned that someday the virus will mutate and the virus will start spreading easily from human-to-human and become a global pandemic. Take a look:
