The World Health Organization has warned that "all of humanity is under threat" from a potential swine flu pandemic and called for "global solidarity" to combat the virus. Let's review: 8 dead in Mexico. 1 dead in U.S. (from Mexico). The annual death toll attributable to influenza and its complications averages 20,000 annually in the United States alone. The latest scare comes from the London Telegraph. Meanwhile Joe Biden says to stay off of planes and subways. To which NYC Mayor Michael Bloomberg says: I'm riding the subway to prove it's no problem.