I don't know whether there is an H5N1 "bird flu" pandemic in our future. H5N1 seems to be very dangerous to humans. Half of the 900 people known to have contracted it worldwide since 2003 have died. And, so a lot of scientists are concerned about the possibility of a pandemic now that the virus has crossed over into mammals including dairy cows.
That means that the milk we drink may have the virus in it though the U.S. Food and Drug Administration says that pasteurization makes the milk safe. Or does it? A recent study indicates that a "small but detectable quantity" of H5N1 bird flu virus can survive "a common approach to pasteurizing milk."
We humans think we can build moats around our modern way of life that protect us from the natural world. We will pasteurize our milk and that will solve the problem. We will spray kitchen counters with some noxious disinfectant to kill offending organisms. We will wash our hands again and again with anti-bacterial soaps. And, when soap and water are not available, we'll use hand sanitizer. All the while we have actually been building the equivalent of superhighways into the heart of human society everywhere due to our dense living arrangements and global travel and trade.