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Virus - Wikipedia
https://en.wikipedia.org/wiki/Virus
WebA virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity.
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Virus | Definition, Structure, & Facts | Britannica
https://www.britannica.com/science/virus
WebNov 26, 2023 · Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria. Viruses possess unique infective properties and thus often cause disease in host organisms. …
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Viruses: Definition, Types, Characteristics & Facts - Cleveland Clinic
https://my.clevelandclinic.org/health/body/24861-virus
WebViruses are small germs (pathogens) that can infect you and make you sick. They can infect humans, plants, animals, bacteria and fungi. Each one infects only specific types of hosts. Viral infections in humans can cause no symptoms or make you extremely ill. Types of diseases they can cause include:
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Viruses - National Geographic Society
https://www.nationalgeographic.org/encyclopedia/viruses/
WebOct 19, 2023 · Viruses are tiny infectious agents that rely on living cells to multiply. They may use an animal, plant, or bacteria host to survive and reproduce. As such, there is some debate as to whether or not viruses should be considered living organisms. A virus that is outside of a host cell is known as a virion.
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Viruses: What They Are, Symptoms, Treatment, Prevention
https://www.verywellhealth.com/viruses-7106426
WebFeb 17, 2023 · Some viruses cause sickness, like common colds, the flu, and food poisoning. Symptoms of a viral infection include fever, pain, nausea, diarrhea, cough, congestion, shortness of breath, rashes, warts, and many others. The best treatment for most everyday viruses is rest, hydration, and time.
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Viruses: What are they, and what do they do? - Medical News …
https://www.medicalnewstoday.com/articles/158179
WebApr 21, 2023 · Summary. Viruses are microscopic particles that are present in animals, plants, and other living organisms. They can sometimes cause diseases, such as the flu and COVID-19. Viruses are biological...
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Intro to viruses (article) | Viruses | Khan Academy
https://www.khanacademy.org/science/biology/biology-of-viruses/virus-biology/a/intro-to-viruses
WebA virus is an infectious particle that reproduces by "commandeering" a host cell and using its machinery to make more viruses. A virus is made up of a DNA or RNA genome inside a protein shell called a capsid. Some viruses have an external membrane envelope. Viruses are very diverse.
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Introduction to viruses - Wikipedia
https://en.wikipedia.org/wiki/Introduction_to_viruses
WebA virus is a tiny infectious agent that reproduces inside the cells of living hosts. When infected, the host cell is forced to rapidly produce thousands of identical copies of the original virus. Unlike most living things, viruses do not have cells that divide; new viruses assemble in the infected host cell. But unlike simpler infectious agents ...
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What is a virus? How do they spread? How do they make us sick?
https://theconversation.com/what-is-a-virus-how-do-they-spread-how-do-they-make-us-sick-133437
WebMar 13, 2020 · A virus that replicates like crazy and kills its host very quickly may not have an opportunity to spread to a new host. On the other hand, a virus that replicates slowly and causes little harm may ...
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Structure and features of viruses | Britannica
https://www.britannica.com/summary/virus
Webvirus, Microscopic, simple infectious agent that can multiply only in living cells of animals, plants, or bacteria. Viruses are much smaller than bacteria and consist of a single- or double-stranded nucleic acid (DNA or RNA) surrounded by a protein shell called a capsid; some viruses also have an outer envelope composed of lipids and proteins ...
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