Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.4
Points
2.0
Fiction/Nonfiction
Nonfiction
Word Count
9283
Points per Word
0.000215
Page Count
64
Points per Page
0.03125
Description
Throughout history, the human species has been at war with viruses, which have claimed countless lives and swept through civilizations in deadly pandemics. Certain viruses, such as smallpox and avian flu, still pose a threat.