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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

New approach to CAR T gene therapy yields efficient and longer-lasting response against HIV

New approach to CAR T gene therapy yields efficient and longer-lasting response against HIV

Type of material used in face masks and fabric layers can affect Covid-19 exposure risk

Type of material used in face masks and fabric layers can affect Covid-19 exposure risk

Prioritization of COVID-19 vaccines saves lives, reduces spread of infection

Prioritization of COVID-19 vaccines saves lives, reduces spread of infection

Scientists identify nine potential new COVID-19 treatments

Scientists identify nine potential new COVID-19 treatments

Study finds CD8+ T cell responses detect all major SARS-CoV-2 variants

Study finds CD8+ T cell responses detect all major SARS-CoV-2 variants

First general selection criteria for lung transplantation in Covid-19 patients

First general selection criteria for lung transplantation in Covid-19 patients

Long-COVID-19 is a significant risk in recovered patients post-hospitalization

Long-COVID-19 is a significant risk in recovered patients post-hospitalization

Proper choice of control group nullifies most observed genetic markers for severe COVID-19, study suggests

Proper choice of control group nullifies most observed genetic markers for severe COVID-19, study suggests

Researchers offer large-scale screening of potential broad-spectrum SARS-CoV-2 antivirals

Researchers offer large-scale screening of potential broad-spectrum SARS-CoV-2 antivirals

Beating the pavement to vaccinate the underrepresented — and protect everyone

Beating the pavement to vaccinate the underrepresented — and protect everyone

Comparative study of SARS, MERS, BAT‐SARS, and SARS-CoV-2

Comparative study of SARS, MERS, BAT‐SARS, and SARS-CoV-2

Researchers use new approach to detect high-risk Human Papilloma Virus

Researchers use new approach to detect high-risk Human Papilloma Virus

Study investigates the efficacy of COVID-19 vaccines over longer term

Study investigates the efficacy of COVID-19 vaccines over longer term

Researchers use new way to detect high-risk Human Papilloma Virus

Researchers use new way to detect high-risk Human Papilloma Virus

COVID-19: Several 'proxy wars' spawned by the pandemic

COVID-19: Several 'proxy wars' spawned by the pandemic

Backed by millions in public and private cash, rapid Covid tests are coming to stores near you

Backed by millions in public and private cash, rapid Covid tests are coming to stores near you

KHN’s ‘What the Health?’: Planning for round two

KHN’s ‘What the Health?’: Planning for round two

Study discovers new target on SARS-CoV-2 spike for protective antibodies

Study discovers new target on SARS-CoV-2 spike for protective antibodies

Research finds possible explanation for why many cancer drugs don't work in human trials

Research finds possible explanation for why many cancer drugs don't work in human trials

Can asymptomatic COVID-19 confer long-term immunity?

Can asymptomatic COVID-19 confer long-term immunity?