Infection vs Inflammation

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

Infection

Top 1,000 (very common)B2noun

Inflammation

Top 3,000 (common)
Most common: Infection
 InfectionInflammation
Pronunciation🇬🇧 /["/ɪnˈfekʃn/"]/🇺🇸 /["/ɪnˈfekʃn/"]/🇬🇧 //ɪnˌflæməˈteɪʃən//🇺🇸 //ɪnˌflæməˈteɪʃən//
MeaningWhen germs or bacteria get into the body and make you sick.Swelling and redness in the body, usually due to injury or infection.
ExampleThe doctor confirmed that the patient had a bacterial infection in his lungs.The doctor explained that inflammation is a natural response to injury.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 3,000 (common)
CEFR levelB2-
Part of speechnoun
Collocationsnasty, 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 infectionchronic inflammation, acute inflammation, reduce inflammation, inflammation response, inflammation markers
Antonymshealth, wellness-
Common mistakesConfused 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'Confused with 'inflation' which refers to rising prices., Using it in non-medical contexts without clarifying meaning., Incorrectly pronounced as 'in-flam-a-tion', the correct pronunciation separates syllables differently.
Usage notesUse '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.It's commonly used in medical contexts to describe a response to injury or infection. Avoid using it in casual conversations unless discussing health topics.

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Infection

Frequently asked questions: Infection vs Inflammation

What's the difference between Infection and Inflammation?

Infection: When germs or bacteria get into the body and make you sick. Inflammation: Swelling and redness in the body, usually due to injury or infection.

Which is more common: Infection and Inflammation?

Infection is the most common in everyday English.

Can you show an example of each?

Infection: The doctor confirmed that the patient had a bacterial infection in his lungs. Inflammation: The doctor explained that inflammation is a natural response to injury.

Can I use Infection and Inflammation interchangeably?

Not always. Infection and Inflammation 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.

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