Because they possess some but not all such qualities, viruses have been described as "organisms at the edge of life",[10] and as replicators.[11] Viruses spread in many ways. One transmission pathway is through disease-bearing organisms known as vectors: for example, viruses are often ...
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism.[1] Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea.[2][3] Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen ...
Vulnerable(VU), a category containing those species that possess a very high risk of extinction as a result of rapid population declines of 30 to more than 50 percent over the previous 10 years (or three generations), a current population size of fewer than 1,000 individuals, or other facto...