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Lesson 1.4 – What is an infectious agent? (2) What viruses do to make us sick

This lesson has two purposes. First, it introduces viruses by demonstrating how important differences between the relative sizes of bacteria and viruses contribute to their modes of action.

The lesson then extends the previous focus on bacterial structures by showing how viral structures also play important roles in infectivity and disease. However, because students are less likely to have basic familiarity with viruses, the structure is organized as a lecture, rather than as an interactive activity.

Teacher Prep

1.4 Classroom Materials

1.4 Alternative Approaches

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