Virus

A virus is a microscopic infectious agent that can reproduce only inside a host cell. Viruses infect all types of organisms: from animals and plants, to bacteria and archaea. Since the initial discovery of tobacco mosaic virus by Martinus Beijerinck in 1898, more than 5,000 types of virus have been described in detail, although most types of virus remain undiscovered. Viruses are ubiquitous, as they are found in almost every ecosystem on Earth, and are the most abundant type of biological entity on the planet. The study of viruses is known as virology, and is a branch of microbiology.
What is a Virus?

A virus is a small infectious agent that can only replicate inside the cells of another organism. The word is from the Latin ''virus'' referring to poison and other noxious substances, first used in English in 1392. ''Virulent'', from Latin ''virulentus'' (poisonous), dates to 1400. A meaning of "agent that causes infectious disease" is first recorded in 1728, The term ''virion'' is also used to refer to a single infective viral particle. The plural is "viruses".

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Latest Virus News and Research

UMass Amherst Ph.D. candidate receives USDA-NIFA fellowship for food allergy research

UMass Amherst Ph.D. candidate receives USDA-NIFA fellowship for food allergy research

Advantages and challenges of intranasal vaccines to fight against COVID-19 infections

Advantages and challenges of intranasal vaccines to fight against COVID-19 infections

Blunted antiviral responses in the nasopharynx may underlie severe COVID-19

Blunted antiviral responses in the nasopharynx may underlie severe COVID-19

Researchers discover camelid-derived two nanobodies that target SARS-CoV-2

Researchers discover camelid-derived two nanobodies that target SARS-CoV-2

Researchers use mass spectrometry to study immunogenic SARS-CoV-2 epitopes

Researchers use mass spectrometry to study immunogenic SARS-CoV-2 epitopes

Clinical trials during a pandemic – lessons from COVID-19

Clinical trials during a pandemic – lessons from COVID-19

Researchers identify an unexpected effect for already characterized active substances

Researchers identify an unexpected effect for already characterized active substances

CDC monitoring over 200 individuals possibly exposed to monkeypox

CDC monitoring over 200 individuals possibly exposed to monkeypox

Synergistic multi-antibody cocktail protects against SARS-CoV-2 in animal model

Synergistic multi-antibody cocktail protects against SARS-CoV-2 in animal model

Llama ‘nanobodies’ have the potential to outwit human cytomegalovirus

Llama ‘nanobodies’ have the potential to outwit human cytomegalovirus

Study in France suggests high efficacy of mRNA vaccines against SARS-CoV-2 variants of concern

Study in France suggests high efficacy of mRNA vaccines against SARS-CoV-2 variants of concern

SARS-CoV-2 reprograms host chromatic network to induce immune dysfunction

SARS-CoV-2 reprograms host chromatic network to induce immune dysfunction

Can prior human seasonal coronavirus antibody response patterns predict SARS-CoV-2 inhibition?

Can prior human seasonal coronavirus antibody response patterns predict SARS-CoV-2 inhibition?

Pfizer vaccine and isolation independently associated with reduced household transmission of SARS-CoV-2

Pfizer vaccine and isolation independently associated with reduced household transmission of SARS-CoV-2

Scientists restore memory in aging mice

Scientists restore memory in aging mice

Wildfire smoke drives people in low-vaccinated areas indoors, raising outbreak fears

Wildfire smoke drives people in low-vaccinated areas indoors, raising outbreak fears

Epstein-Barr virus reactivation may play a role in long COVID and severe COVID-19 cases

Epstein-Barr virus reactivation may play a role in long COVID and severe COVID-19 cases

Emerging SARS-CoV-2 mutations L452R & Y453F evade cellular immunity

Emerging SARS-CoV-2 mutations L452R & Y453F evade cellular immunity

Scientist explore conserved RNA elements as potential targets for anti-SARS-CoV-2 drugs

Scientist explore conserved RNA elements as potential targets for anti-SARS-CoV-2 drugs

Two-dose regimen of mRNA vaccines provides protection against Alpha and Beta variants in France

Two-dose regimen of mRNA vaccines provides protection against Alpha and Beta variants in France