"The plane will drop a note on your town, telling them you got through to us," Hal Barton told Pat, who was sitting up watching Max dexterously put the blood and spinal fluids into the right bottles without exposing them to air. "We won't be free to contact your people until we know if they still carry melting sickness," Max added. "You might be immune so it doesn't show on you, but still carry enough germs--if that's what caused it--to wipe out a planet." "If you do carry melting sickness," said Hal Barton, "we won't be able to mingle with your people until we've cleared them of the disease." "Starting with me?" Pat asked. "Starting with you," Max told him ruefully, "as soon as you step on board." "More needles?" "Yes, and a few little extras thrown in." "Rough?" "It isn't easy." A few minutes later, standing in the stalls for spacesuit decontamination, being buffeted by jets of hot disinfectant, bathed in glares of sterilizing ultraviolet radiation, June remembered that and compared Pat Mead's treatment to theirs. In the _Explorer_, stored carefully in sealed tanks and containers, was the ultimate, multi-purpose cureall. It was a solution of enzymes so like the key catalysts of the human cell nucleus that it caused chemical derangement and disintegration in any non-human cell. Nothing could live in contact with it but human cells; any alien intruder to the body would die. Nucleocat Cureall was its trade name. But the cureall alone was not enough for complete safety. Plagues had been known to slay too rapidly and universally to be checked by human treatment. Doctors are not reliable; they die. Therefore spaceways and interplanetary health law demanded that ship equipment for guarding against disease be totally mechanical in operation, rapid and efficient. Somewhere near them, in a series of stalls which led around and around like a rabbit maze, Pat was being herded from stall to stall by peremptory mechanical voices, directed to soap and shower, ordered to insert his arm into a slot which took a sample of his blood, given solutions to drink, bathed in germicidal ultraviolet, shaken by sonic blasts, breathing air thick with sprays of germicidal mists, being directed to put his arms into other slots where they were anesthesized and injected with various immunizing solutions. Finally, he would be put in a room of high temperature and extreme dryness, and instructed to sit for half an hour while more fluids were dripped into his veins through long thin tubes. All legal spaceships were built for safety. No chance was taken of allowing a suspected carrier to bring an infection on board with him. * * * * * June stepped from the last shower stall into the locker room, zipped off her spacesuit with a sigh of relief, and contemplated herself in a wall mirror. Red hair, dark blue eyes, tall.... "I've got a good figure," she said thoughtfully.