
Daniel Feldman was a doctor once. He made the mistake of saving a friend's life in violation of Medical Lobby rules. Now, he's a pariah, shunned by all, forbidden to touch another patient. But things are more loose on Mars. There, Doc Feldman is welcomed by the colonists, even as he's hunted by the authorities. But, when he discovers a Martian plague may soon wipe out humanity on two planets, Feldman finds himself a pivotal figure. War erupts. Earth is poised to wipe out the Mars colony utterly. A cure to the plague is the price of peace, and only Feldman can find it. (summary by Steven H. Wilson) Originally published in the June 1957 issue of Satellite Science Fiction.
Author

Lester del Rey was an American science fiction author and editor. Del Rey is especially famous for his juvenile novels such as those which are part of the Winston Science Fiction series, and for Del Rey Books, the fantasy and science fiction branch of Ballantine Books edited by Lester del Rey and his fourth wife Judy-Lynn del Rey. Also published as: Philip St. John Eric van Lihn Erik van Lhin Kenneth Wright Edson McCann (with Frederik Pohl)