In the seven years since its prodigious healing powers dazzled the world, penicillin has often caused people to break out in a mild rash. Occasionally it has caused more severe reactions. Last week, in the U.S. Armed Forces Medical Journal, a Navy medical officer warned sharply that the ill effects of penicillin are increasing in both number and gravity. Reactions like old-fashioned serum sickness, he said, suggest that penicillin may act as such a strong sensitizing agent that a second course of treatment with it becomes impossible for a while.
Calling penicillin "an...