Scale: 10-7 meters = 100 nm = 100 nanometers
Viruses are forms of life made up almost exclusively of DNA. Once inside
living cells, viruses are able to use the host cell's material to make
more copies of the virus, which can then infect other cells. At this
step we can begin to resolve some of the smallest viruses using an electron
scanning or electron tunneling microscope.
Copyright © 2016 by Bruce Bryson