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Unit 2

What does it mean to have an infectious disease?

What makes contracting cholera different from getting cancer or food poisoning? What did people think caused infectious disease before they had the tools to see viruses and bacteria with their own eyes? In this unit, we put modern and historical theories to the test.

Lesson 1: Infectious Disease Detectives – Typhoid Mary (pdf)

Lesson 2: How can we prove a disease is infectious? Identifying bacteria and viruses (pdf)

Lesson 3: Identifying infectious bacteria — Infectious spread (pdf)

Lesson 4: Identifying infectious bacteria — Koch’s postulates and cholera (pdf)

Lesson 5: Causation of an infectious disease — Koch’s postulates and ulcers (pdf)

Do Online: Unit 2 Multimedia

Infectious Disease Blog: Unit 2 Further Reading