This short focuses on the story of Dr. Edward Jenner, who developed vaccination.
| Actor | Role |
|---|---|
| JJohn NesbittNarrator (voice) | Narrator (voice) |
 Matthew BoultonDr. Edward Jenner (uncredited) | Dr. Edward Jenner (uncredited) |
 Helen BrownMary Phipps (uncredited) | Mary Phipps (uncredited) |
 Harry CordingVillage Dairyman (uncredited) | Village Dairyman (uncredited) |
 Fay HelmMrs. Edward Jenner (uncredited) | Mrs. Edward Jenner (uncredited) |
 Raymond SevernLittle Jim Phipps (uncredited) | Little Jim Phipps (uncredited) |
 William TannenSarah's Sweetheart (uncredited) | Sarah's Sweetheart (uncredited) |