[1] Both were co-written by Sidney Howard and Paul de Kruif (the former a Pulitzer- and Oscar-winning playwright and screenwriter; the latter a well-known microbiologist and author).

[2] Produced and directed by the legendary Guthrie McClintic, the original Broadway play co-starred James Stewart and Sam Levene and opened at the Martin Beck Theatre, March 6, 1934.

[3] Stewart's performance as Sergeant John O'Hara in the Broadway production of Yellow Jack attracted the attention of Hollywood along with a MGM contract.

The dramas portrayed the soldiers who volunteered to be human "guinea pigs" by allowing themselves to be bitten and contract the deadly disease, for which no cure was then known.

That their heroism, however, should not go unrecorded, their true names are here given: The play and screenplay were adapted for television by Celanese Theatre (1952) and Producers' Showcase (1955), in episodes titled Yellow Jack.