Biology · Human Health and Diseases
Smallpox was successfully eradicated worldwide due to several favorable factors, EXCEPT:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Availability of a highly potent vaccine
- 2Highly visible and easy-to-recognize clinical signs
- 3Presence of an extra-human animal reservoir✓
- 4Short incubation period
Correct answer
Presence of an extra-human animal reservoir
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