A virus vs Infection

When to use each in English, with meaning, register, and examples.

A virus

Top 2,000 (common)

Infection

Top 1,000 (very common)B2noun
Most common: Infection
 A virusInfection
Pronunciation🇬🇧 //ə ˈvaɪərəs//🇺🇸 //ə ˈvaɪərəs//🇬🇧 /["/ɪnˈfekʃn/"]/🇺🇸 /["/ɪnˈfekʃn/"]/
MeaningA tiny germ that can make people sick.When germs or bacteria get into the body and make you sick.
ExampleThe doctor diagnosed her with a viral infection caused by a virus.The doctor confirmed that the patient had a bacterial infection in his lungs.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR level-B2
Part of speechnoun
Collocationsviral outbreak, computer virus, viral infection, transmit a virusnasty, serious, severe, have, suffer, suffer from, develop, occur, spread, in infection, infection from, infection through, a cause of infection, the onset of infection, resistance to infection, nasty, serious, severe, have, suffer, suffer from, develop, occur, spread, in infection, infection from, infection through, a cause of infection, the onset of infection, resistance to infection
Antonyms-health, wellness
Common mistakesConfused with 'bacteria' - viruses are smaller and behave differently., Saying 'a viruses' instead of 'a virus' - 'virus' is singular., Mixing up usage - 'virus' refers to the germ, not the disease it causes.Confused with 'inflection' (change in speech), Using 'infection' to refer to non-medical situations, Incorrectly stating a person is an 'infection' instead of having an 'infection'
Usage notesCommonly used in medical and scientific contexts. Not typically used in everyday conversation unless discussing health. Avoid using in informal chat to maintain clarity.Use 'infection' in medical or health contexts. It's appropriate for conversations with healthcare professionals or when discussing illnesses. Avoid using it in casual or non-serious discussions.

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A virus
Infection

Frequently asked questions: A virus vs Infection

What's the difference between A virus and Infection?

A virus: A tiny germ that can make people sick. Infection: When germs or bacteria get into the body and make you sick.

Which is more common: A virus and Infection?

Infection is the most common in everyday English.

Can you show an example of each?

A virus: The doctor diagnosed her with a viral infection caused by a virus. Infection: The doctor confirmed that the patient had a bacterial infection in his lungs.

Can I use A virus and Infection interchangeably?

Not always. A virus and Infection are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.