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World 7 · Vaccines, Outbreaks and Herd Immunity · 13 min · PRO

How vaccines train the body

A safe preview of the enemy

PRO · Microbe Zoo

World 7: Vaccines, Outbreaks and Herd Immunity is part of PRO

The first world of Microbe Zoo is free. PRO opens the other 27 lessons in 6 worlds — simulations, quizzes and all.

  • Kinds of vaccine
  • The outbreak model
  • R₀ and the reproduction number
  • Herd immunity
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

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