 The Lourdes medical team declared the case “miraculous.” But an American team examined the data and discovered that the necessary tests—a spinal tap and a brain scan—had not been done to properly establish the cause of the condition.In fact, the American doctors said, Perrin’s symptoms are classic signs of hysteria; in the absence of appropriate medical tests, that was a much more probable diagnosis.Furthermore, hysteria is known to respond favorably to highly emotional circumstances like those encountered at religious ceremonies...