[3] The first sue on a human occurred in December 1940, but wartime shortages and restrictions limited the supply of the drug.

[4] In 1941, Heatley and Florey travelled to the United States because they wanted to produce about one kilogram of pure penicillin, and persuaded a laboratory in Peoria, Illinois, to develop larger-scale manufacturing of it.

Moyer suggested adding corn-steep liquor, a by-product of starch extraction, to the growth medium.

"[5] Florey returned to Oxford that September, but Heatley stayed on in Peoria until December; then for the next six months, he worked at Merck & Co. in Rahway, New Jersey.

When he published their research results, he omitted Heatley's name from the paper, despite an original contract which stipulated that any publications should be jointly authored.