WORRIES: Mutant-Bird-Flu Study Fuels Fears of Airborne H5N1. “Whether they could gather in one strain is now a pressing question, as is a more fundamental scientific question: Do the mutations represent a mechanism by which H5N1 could become contagious in humans, or just in ferrets? And if they are directly relevant to human infections, do they represent a primary route, or one of many possible paths?”

Can we get that universal flu vaccine soon?