 How would the shot theoretically cure headaches?
"When we prove our results that should be of enough practical value for anyone. No one knew whether his Theory of Spatium was correct or not because no one had yet been able to frame an argument with it. The government took up a lot of his time using him as the symbol of the Ideal Scientist to help recruit Science and Engineering Cadets. For the past seven years Macklin—who was the Advanced Studies Department of Firestone University—had been involved in devising a faster-than-light drive to help the Army reach Pluto and eventually the nearer stars. Despite his impressive body, some years before he had suffered a mild stroke ... or at least a vascular spasm of a cerebral artery. "I would have said the common cold," Macklin replied, "but I suppose from what you have said you mean headaches." "But think," Ferris interjected, "what a boon it would be if everyone could be cured of headaches forever by one simple injection." "Aspirins would still be used to reduce fever and relieve muscular pains," Mitchell said. "There are a number of different causes for headaches—nervous strain, fatigue, physical diseases from kidney complaints to tumors, over-indulgence—but there is one effect of all of this, the one real cause of headaches," Mitchell announced. "The pressure effect caused by pituitrin in the brain," Mitchell said eagerly. "The virus," Ferris explained, "can easily be localized and stabilized. A colony of virus in the brain cells will relax the cerebral vessels—and only the cerebral vessels—so that the cerebrospinal fluid doesn't create pressure in the cavities of the brain." "If this really works, I could stop using that damned gynergen, couldn't I? Unless we can produce quick, conclusive and dramatic proof of our studies we can get no more financial backing. When I start making slips like that it means another attack of migraine. You aren't much better off with it than without, are you? "Low blood pressure," Ferris said. "When your heart stops, your blood pressure goes to its lowest point," Mitchell said. Ferris and I are confident that there is no danger.... By established periodic cycle he should be suffering hell right now, shouldn't he? The public will hand down a ukase demanding our virus, just as they demanded the Salk vaccine and the Grennell serum." "Most known narcotics," she admitted, "but evidently you have discovered something new.
 It would address the root problem of every headache. By focusing on the core behind a headache, it can be used in any circumstance.
 It would address the root problem of every headache. By focusing on the core behind a headache, it can be used in any circumstance.  It would separately address any problem that could cause a headache, from tumors to fatigue. It's built to be an answer to everything.  It constricts the blood vessels with an artificial virus.  It's not a cure at all, it's a virus.