Characteristics of which virus consist of a double-stranded genome and virions that appear as oval,brick-shaped structures of 200 to 400 nm in length? In addition,the World Health Organization (WHO)eradicated this virus in 1980.
A)Cowpox
B)Chicken pox
C)Swinepox
D)Smallpox

Question

Quizplus · Accepted Answer

Smallpox is known to infect only humans and exists as two distinct subtypes,variola major,which causes the most severe disease (case fatality rates of 30%)and occurs mainly in Asia;and variola minor,which is associated with less severe disease (case fatality rates of 0.1% to 2%).Through an intensive vaccine campaign,the WHO declared natural-occurring variola virus eradicated in 1980.

Characteristics of Which Virus Consist of a Double-Stranded Genome and Virions