Variola major ordinary type is the most common form of smallpox in unvaccinated populations.

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In unvaccinated people, the disease most commonly presents as ordinary variola major. This form is the classic, standard presentation of smallpox, characterized by a sudden onset of fever and systemic symptoms followed by a vesiculopustular rash that develops in the same stage across all lesions and is typically most pronounced on the face and limbs. Other forms, such as flat, hemorrhagic, or modified variola, occur far less often and usually under special circumstances like partial immunity or compromised health. Because the ordinary variola major is the typical pattern seen when there’s no prior vaccination, the statement is true.