Overview:
In Lessons 17—19, three theories of the origin of HIV are presented for you and your students/clients to examine and deliberate. Each lesson is its own module however we have also grouped them together since the modules are closely related.  Insomuch, we have provided a warm-up activity that will help you complete the activity for each module and a capstone activity after the three modules are complete.

The lessons are as follows:

Lesson 17: Natural Transfer Theory
Lesson 18: Serial Passage Theory
Lesson 19: OPV Theory
Capstone Activity: Lessons 17—19

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