virus
noun /ˈvaɪrəs/
  /ˈvaɪrəs/
- a living thing, too small to be seen without a microscope, that causes disease in people, animals and plants
- the flu/influenza virus
 - patients known to have been infected with the virus
 - the human immunodeficiency virus or HIV
 - the hepatitis C virus
 - a highly infectious disease caused by a virus
 - a virus infection
 - The vaccination offers good protection against the virus.
 - It is not clear how she contracted the virus.
 
Wordfinder- bacteria
 - disease
 - epidemic
 - fever
 - illness
 - immunity
 - infection
 - spread
 - vaccinate
 - virus
 
Collocations IllnessesIllnessesBecoming ill- catch a cold/an infectious disease/the flu/(British English) flu/pneumonia/a virus/(informal) a bug
 - get (British English) ill/(North American English) sick/a disease/AIDS/breast cancer/a cold/the flu/(British English) flu/a migraine
 - come down with a cold/the flu/(British English) flu
 - contract a deadly disease/a serious illness/HIV/AIDS
 - be infected with a virus/a parasite/HIV
 - develop cancer/diabetes/a rash/an ulcer/symptoms of hepatitis
 - have a heart attack/a stroke
 - provoke/trigger/produce an allergic reaction
 - block/burst/rupture a blood vessel
 - damage/sever a nerve/an artery/a tendon
 
- feel (British English) ill/nauseous/queasy
 - be running (British English) a temperature/(North American English) a fever
 - have a head cold/diabetes/heart disease/lung cancer/a headache/(British English) a high temperature/(North American English) a fever
 - suffer from asthma/malnutrition/frequent headaches/bouts of depression/a mental disorder
 - be laid up with/ (British English) be in bed with a cold/the flu/(British English) flu/a migraine
 - nurse a cold/a headache/a hangover
 - battle/fight cancer/depression/addiction/alcoholism
 
- examine a patient
 - diagnose a condition/disease/disorder
 - be diagnosed with cancer/diabetes/schizophrenia
 - prescribe/be given/be on/take drugs/medicine/medication/pills/painkillers/antibiotics
 - treat somebody for cancer/depression/shock
 - have/undergo an examination/an operation/surgery/a kidney transplant/therapy/chemotherapy/treatment for cancer
 - have/be given an injection/(British English) a flu jab/(North American English) a flu shot/a blood transfusion/a scan/an X-ray
 - cure a disease/an ailment/cancer/a headache/a patient
 - prevent the spread of disease/further outbreaks/damage to the lungs
 - be vaccinated against the flu/(British English) flu/the measles/(British English) measles/polio/smallpox
 - enhance/boost/confer/build immunity to a disease
 
Collocations The living worldThe living worldAnimals- animals mate/breed/reproduce/feed (on something)
 - fish/amphibians swim/spawn (= lay eggs)
 - birds fly/migrate/nest/sing
 - insects crawl/fly/bite/sting
 - insects/bees/locusts swarm
 - bees collect/gather nectar/pollen
 - spiders spin/weave a web
 - snakes/lizards shed their skins
 - bears/hedgehogs/frogs hibernate
 - insect larvae grow/develop/pupate
 - an egg/a chick/a larva hatches
 - attract/find/choose a mate
 - produce/release eggs/sperm
 - lay/fertilize/incubate/hatch eggs
 - inhabit a forest/a reef/the coast
 - mark/enter/defend (a) territory
 - stalk/hunt/capture/catch/kill prey
 
- trees/plants grow/bloom/blossom/flower
 - a seed germinates/sprouts
 - leaves/buds/roots/shoots appear/develop/form
 - flower buds swell/open
 - a fungus grows/spreads/colonizes something
 - pollinate/fertilize a flower/plant
 - produce/release/spread/disperse pollen/seeds/spores
 - produce/bear fruit
 - develop/grow/form roots/shoots/leaves
 - provide/supply/absorb/extract/release nutrients
 - perform/increase/reduce photosynthesis
 
- bacteria/microbes/viruses grow/spread/multiply
 - bacteria/microbes live/thrive in/on something
 - bacteria/microbes/viruses evolve/colonize something/cause disease
 - bacteria break something down/convert something (into something)
 - a virus enters/invades something/the body
 - a virus mutates/evolves/replicates (itself)
 - be infected with/contaminated with/exposed to a new strain of a virus/drug-resistant bacteria
 - contain/carry/harbour bacteria/a virus
 - kill/destroy/eliminate harmful/deadly bacteria
 
Extra ExamplesTopics Illnessa2, Biologya2- An infected person can pass the virus to others.
 - The virus attacks a variety of cells in the body.
 
Oxford Collocations Dictionaryadjective- deadly
 - killer
 - lethal
 - …
 
- be infected with
 - catch
 - contract
 - …
 
- infect somebody/something
 - attack somebody/something
 - kill somebody/something
 - …
 
- infection
 - vaccine
 - transmission
 - …
 
 - (informal) a disease caused by a virus
- There's a virus going around the office.
 - I must have caught a virus on holiday.
 
Oxford Collocations Dictionaryadjective- deadly
 - killer
 - lethal
 - …
 
- be infected with
 - catch
 - contract
 - …
 
- infect somebody/something
 - attack somebody/something
 - kill somebody/something
 - …
 
- infection
 - vaccine
 - transmission
 - …
 
 - instructions that are hidden within a computer program and are designed to cause faults or destroy data
- a computer virus
 - I think I've got a virus on my laptop.
 - The virus in the software was programmed to corrupt the hard disk.
 - software errors that can be exploited by virus writers
 
Collocations Email and the internetEmail and the internetEmail- receive/get/open an email
 - write/send/answer/forward/delete an email
 - check/read/access your email
 - block/filter (out) junk/spam/unsolicited email
 - exchange email addresses
 - open/check your inbox
 - junk mail fills/floods/clogs your inbox
 - have/set up an email account
 - open/send/contain an attachment
 - sign up for/receive email alerts
 
- use/access/log onto the internet/the Web
 - go online/on the internet
 - have a high-speed/broadband/wireless (internet) connection
 - access/connect to/locate the server
 - use/open/close/launch a/your web browser
 - browse/surf/search/scour the internet/the Web
 - send/contain/spread/detect a(n) (computer/email) virus
 - update your anti-virus software
 - install/use/configure a firewall
 - accept/enable/block/delete cookies
 
- visit/check a website/an internet site/somebody’s blog
 - create/design/launch a website/social networking site
 - start/write/post/read a blog
 - update your blog/a website
 - be in/meet somebody in/go into/enter an internet chat room
 - download/upload music/software/a song/a podcast/a file/a copy of something
 - share information/data/files
 - post a comment/message on a(n) website/online message board/web forum/internet chat room
 - stream video/audio/music/content over the internet
 - join/participate in/visit/provide a(n) (web-based/web/online/internet/discussion) forum
 - generate/increase/monitor internet traffic
 
Extra ExamplesTopics Computersa2- A teenage boy was arrested for being the creator of the BomBlast virus that caused severe disruption to the country's defence systems.
 - Most viruses can only spread if you open an email attachment.
 - My computer has caught some kind of virus, and it won't let me log on to the internet.
 - The latest virus will attach itself to all the addresses in your email address book.
 - Your virus definitions are not up to date.
 - anti-virus software
 
Oxford Collocations Dictionaryadjective- computer
 
- be infected with
 - create
 - develop
 - …
 
- attack something
 - destroy something
 - spread
 - …
 
- threat
 - warning
 - protection
 - …
 
 see also viral 
Word Originlate Middle English (denoting the venom of a snake): from Latin, literally ‘slimy liquid, poison’. The earlier medical sense, superseded by the current use as a result of improved scientific understanding, was ‘a substance produced in the body as the result of disease, especially one capable of infecting others’.