Chapter 25
Supplemental Quiz

1. Explain why influenza remains a real threat to human health. What characteristics of the virus make it a good pathogen? Why have scientists not been able to irradicate influenza through a vaccination program, as they have with smallpox?

2. Describe the infection process of RNA viruses. How is it different from DNA viruses? Is there an advantage in being an RNA virus?

3. A "good" viral pathogen ensures its passage to another host before it kills its current one. Explain how HIV is a "good" viral pathogen while Ebola is not.

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