Question: Do they infect all types of cellular life?
About the article "Virus", section "Host range".

Candidate passages:
Animal viruses are viruses that infect animals.
Viruses infect all cellular life and although viruses infect every animal, plant and protist species, each has their own specific range of viruses that often infect only that species. 
Viruses are by far the most abundant biological entities on Earth and they outnumber all the others put together.
They infect all types of cellular life including animals, plants, bacteria and fungi.
However, different types of viruses can infect only a limited range of hosts and many are species-specific.
Some, such as smallpox virus for example, can infect only one species – in this case humans, and are said to have a narrow host range.
Other viruses, such as rabies virus, can infect different species of mammals and are said to have a broad range.
The viruses that infect plants are harmless to animals, and most viruses that infect other animals are harmless to humans.
The host range of some bacteriophages is limited to a single strain of bacteria and they can be used to trace the source of outbreaks of infections by a method called phage typing.
Mimivirus shows many characteristics which place it at the boundary of living and non-living.
It is as large as several bacterial species, such as "Rickettsia conorii" and "Tropheryma whipplei", possesses a genome of comparable size to several bacteria, including those above, and codes for products previously not thought to be encoded by viruses.
In addition, mimivirus has genes coding for nucleotide and amino acid synthesis, which even some small obligate intracellular bacteria lack.
They do however, lack genes for ribosomal proteins, making mimivirus dependent on a host cell for protein translation and energy metabolism.
Because its lineage is very old and could have emerged prior to cellular organisms, "Mimivirus" has added to the debate over the origins of life.
Some genes unique to "Mimivirus", including those coding for the capsid, have been conserved in a variety of viruses which infect organisms from all domains.
This has been used to suggest that "Mimivirus" is related to a type of DNA virus that emerged before cellular organisms and played a key role in the development of all life on Earth.
An alternative hypothesis is that there were three distinct types of DNA viruses that were involved in generating the three known domains of life—eukarya, archaea and bacteria.
Nevertheless, mimivirus does not exhibit the following characteristics, all of which are part of many conventional definitions of life: homeostasis, energy metabolism, response to stimuli, autopoiesis, growth in the normal sense of the term (instead replicating via self-assembly of individual components) or undergoing cellular division. 
 Verhulst equation virology virus - an infectious agent (that can only be seen by a microscope) that is capable of growing and reproducing outside of a host cell.
Viruses can infect all forms of cellular life.  
Viruses infect all cellular life and, although viruses occur universally, each cellular species has its own specific range that often infect only that species.
Some viruses, called satellites, can replicate only within cells that have already been infected by another virus.