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

Nurses and doctors sick with COVID feel pressured to get back to work

Nurses and doctors sick with COVID feel pressured to get back to work

C-type lectin receptors play a role in SARS-CoV-2 infection

C-type lectin receptors play a role in SARS-CoV-2 infection

Study: High blood sugar may trigger worse outcomes in COVID-19 patients

Study: High blood sugar may trigger worse outcomes in COVID-19 patients

Study reveals new clues about SARS-CoV-2 infection

Study reveals new clues about SARS-CoV-2 infection

Open access journal posts COVID-19 preprint studies to reduce misinformation

Open access journal posts COVID-19 preprint studies to reduce misinformation

New model predicts which COVID-19 patients are at higher risk for hospitalization

New model predicts which COVID-19 patients are at higher risk for hospitalization

Research looks at convalescent plasma use in COVID-19 mouse model

Research looks at convalescent plasma use in COVID-19 mouse model

SARS-CoV-2 a "swarm" of mutant viruses

SARS-CoV-2 a "swarm" of mutant viruses

Study highlights need to understand different environmental conditions that affect surface chemistry of SARS-CoV-2

Study highlights need to understand different environmental conditions that affect surface chemistry of SARS-CoV-2

Can SARS-CoV-2 be transmitted via feces?

Can SARS-CoV-2 be transmitted via feces?

Smoking and vaping significantly increase risk of COVID-19 in teens and young adults

Smoking and vaping significantly increase risk of COVID-19 in teens and young adults

Scientist explains why COVID-19 targets only some organs while others are spared

Scientist explains why COVID-19 targets only some organs while others are spared

Focusing on human enzymes and not SARS-CoV-2 could help treat COVID-19

Focusing on human enzymes and not SARS-CoV-2 could help treat COVID-19

Researchers uncover a new vulnerability in the novel coronavirus' infamous spike protein

Researchers uncover a new vulnerability in the novel coronavirus' infamous spike protein

Natural compund in cedar and grapefruit skin could help repel mosquitoes and ticks says CDC

Natural compund in cedar and grapefruit skin could help repel mosquitoes and ticks says CDC

Inhaled delivery of a potent neutralizing nanobody effective against SARS-CoV-2

Inhaled delivery of a potent neutralizing nanobody effective against SARS-CoV-2

Study to examine possible effects of COVID-19 on dementia risk in older adults

Study to examine possible effects of COVID-19 on dementia risk in older adults

Stanford study reveals immunological deviations and lapses in severe COVID-19 cases

Stanford study reveals immunological deviations and lapses in severe COVID-19 cases

Protein uses two different mechanisms to inhibit viral infections

Protein uses two different mechanisms to inhibit viral infections

Public health officials are quitting or getting fired in throes of pandemic

Public health officials are quitting or getting fired in throes of pandemic