A medical researcher is sent to a plague outbreak, where he has to decide priorities for the use of a vaccine.
| Directing | John Ford | Director |
| Production | Samuel Goldwyn | Producer |
| Editing | Hugh Bennett | Editor |
| Production | Robert McIntyre | Casting |
| Art | Richard Day | Set Decoration |
| Camera | Ray June | Director of Photography |
| Sound | Alfred Newman | Original Music Composer |
| Production | Arthur Hornblow Jr. | Executive Producer |
| Writing | Sinclair Lewis | Novel |
| Writing | Sidney Howard | Screenplay |
| Directing | Herbert Sutch | Assistant Director |
| Art | Richard Day | Settings |
| Sound | Jack Noyes | Sound |
| Crew | Samuel Goldwyn | Presenter |
| Sound | Alfred Newman | Music Director |
| Sound | Ray Heindorf | Orchestrator |
