Beakman is asked about vaccinations, and calls upon Dr. Edward Jenner to explain how he came up with the idea. He later does a truck with water and a funnel and examines heat from friction.
Elenco:
Paul Zaloom
,
Jean Stapleton
,
Alanna Ubach
,
Senta Moses
,
Mark Ritts
,
Eliza Schneider
.
