Classicly

Ricardo's Virus was viciously prompt: six hours after its light, saffron globules had formed in an open wound, you were dead. And no frantic surgery, no pathetic attempts at drainage, could save you. Graff should know. His parents, his brothers and sisters had been a small fraction of the New Kalamazoo death totals due to cuts and scratches observed too late for antisepsis. The virus had accounted for most of three generations of Venusian colonists, including Vilfredo Ricardo himself, the first man to set hesitant foot on the swampy planet. Ricardo had merely skinned his hand on his new flagpole.