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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Overview

Feature Articles

Latest Virus News and Research

Study identifies five immune response markers that may predict COVID-19 patient outcomes

Study identifies five immune response markers that may predict COVID-19 patient outcomes

Advanced analysis offers new insights into immune system’s role in severe COVID-19

Advanced analysis offers new insights into immune system’s role in severe COVID-19

In rural Missouri, Latinos learn to contain and cope with the coronavirus

In rural Missouri, Latinos learn to contain and cope with the coronavirus

Test sites quickly attract thousands for COVID-19 vaccine study

Test sites quickly attract thousands for COVID-19 vaccine study

Immunothrombotic dysregulation is key marker of disease severity in COVID-19

Immunothrombotic dysregulation is key marker of disease severity in COVID-19

Coronavirus-specific structure in cells may lead to new antiviral strategies

Coronavirus-specific structure in cells may lead to new antiviral strategies

How misinformation undermines Australia's COVID-19 response

How misinformation undermines Australia's COVID-19 response

Oncologists interview physicians to identify specific communication related to COVID-19

Oncologists interview physicians to identify specific communication related to COVID-19

Study: Drinking honeysuckle decoction accelerates the negative conversion of COVID-19 patients

Study: Drinking honeysuckle decoction accelerates the negative conversion of COVID-19 patients

Immune system derails during severe course of COVID-19

Immune system derails during severe course of COVID-19

Electric multicookers could be used for sanitization of N95 respirator masks

Electric multicookers could be used for sanitization of N95 respirator masks

Study documents changes in hospital visitation and communication policies during COVID-19

Study documents changes in hospital visitation and communication policies during COVID-19

Humans promote diseases from the animal kingdom

Humans promote diseases from the animal kingdom

Study shows recombination among SARS-CoV-2 strains is already occurring, but remains rare

Study shows recombination among SARS-CoV-2 strains is already occurring, but remains rare

Heat suggested as a therapeutic intervention in COVID-19

Heat suggested as a therapeutic intervention in COVID-19

COVID-19 in pregnancy - premature birth common

COVID-19 in pregnancy - premature birth common

COVID-19: BCG vaccine is safe and possibly has a positive effect

COVID-19: BCG vaccine is safe and possibly has a positive effect

With caveats, hopeful news for preschools planning young kids’ return

With caveats, hopeful news for preschools planning young kids’ return

Health care workers of color nearly twice as likely as whites to get COVID-19

Health care workers of color nearly twice as likely as whites to get COVID-19

Nine teams awarded UTHSC/UofM CORNET grant for COVID-19 research

Nine teams awarded UTHSC/UofM CORNET grant for COVID-19 research