U.S. Secretary of Health and Human Services Kathleen Sebelius speaking to the World Health Assembly image courtesy of US Mission Geneva/Eric Bridiers.

“Every pandemic emergence seems to be a law unto itself.” David Morens, Jeffrey Taubenberger, and Anthony Fauci wrote in The New England Journal of Medicine that there’s no evidence viruses that develop one mutation that could lead them to becoming pandemic will necessarily develop any others. In fact, an important open question is whether any bird flu virus that infects humans could viably develop the …