Enlarge / Hydrophylax bahuvistara (credit: Sanil-George-Jessica-Shartouny) From the slimy backs of a South Indian frog comes a new way to blast influenza viruses. A compound in the frog’s mucus—long known to have germ-killing properties—can latch onto flu virus particles and cause them to burst apart, researchers report in Immunity. The peptide is a potent and precise killer, able to demolish a whole class of flu viruses while leaving other viruses and cells unharmed.