Bird Flu Spreads: Second Human Case Confirmed in US. Experts warn current outbreak could be a precursor to a pandemic. Learn what bird flu is, how it transmits, and if you should be worried.
H5N1 is one of the earliest type of avian flu that infected humans. Recently, it also death of penguin species raising alarm bells across the globe. - H5N1 Bird Flu: Is It Transferable to Humans? 5 Precautionary Tips