Penicillin production began during World War II; when was it brought into production?

• A. 1945
• B. 1928
• C. 1955
• D. 1967

Answer: (A)

Turning a lab discovery into mass-produced medicine requires building production capacity, refining the manufacturing process, and creating reliable distribution. Penicillin followed this path: after its initial lab breakthrough, it took time to develop scalable fermentation and purification methods and to establish factories and supply chains. Those efforts peaked as World War II progressed, and by the war’s end penicillin was being produced in large quantities and supplied widely. That timing—when production was actually established and available on a broad scale—is why the late-war period is the best fit. The other dates point to the original discovery or to times after production was already well established, not to when it first reached production on a large scale.