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It is estimated that viruses kill approximately 20% of this biomass each day and that there are 10 to 15 times as many viruses in the oceans as there are bacteria and archaea. [205]
This is a list of all virus species, including satellites and viroids. Excluded are other ranks, and other non-cellular life such as prions. Also excluded are common names and obsolete names for viruses. The taxonomy is taken from ICTV taxonomy 2022 release [1] For a list of virus families and subfamilies, see List of virus families and ...
However, there is a lack of sources which describe major TB epidemics with definite time spans and death tolls. Hepatitis B : According to the World Health Organization, as of 2019 [update] there are about 296 million people living with chronic hepatitis B, with 1.5 million new infections each year.
In fact, there are so many viruses that if you combined all of Earth’s viruses, they would cover an area spanning 100 million light-years, according to a study in Nature Reviews Microbiology.
See also Comparison of computer viruses. This is an alphabetical list of biological virus families and subfamilies; it includes those families and subfamilies listed by the ICTV 2023 report. [1] For a list of individual species, see List of virus species. For a list of virus genera, see List of virus genera.
As for the common cold, there are over 200 viruses that can cause it. The period of infectiousness depends on the virus and on the health of the individual infected, but generally follows a ...
Many individually named viruses (sometimes referred to as "virus strains") exist at below the rank of virus species. The ICVCN gives the examples of blackeye cowpea mosaic virus and peanut stripe virus, which are both classified in the species Bean common mosaic virus , the latter a member of the genus Potyvirus that will in due course receive ...
There are many ways in which viruses spread from host to host but each species of virus uses only one or two. Many viruses that infect plants are carried by organisms; such organisms are called vectors. Some viruses that infect animals, including humans, are also spread by vectors, usually blood-sucking insects, but direct transmission is more ...