caught a flu vs caught flu

Both "caught a flu" and "caught flu" are commonly used phrases, but "caught the flu" is the most common and natural way to express this idea. The use of the definite article 'the' before 'flu' is more idiomatic and widely accepted.

Last updated: March 24, 2024

caught a flu

This phrase is correct but less common than 'caught the flu.'

This phrase is used to indicate that someone has contracted a specific instance of the flu virus. It is grammatically correct but less common than 'caught the flu.'

Some examples from our editors:

I caught a flu last winter and was sick for a week.
She caught a flu from her coworker who was sneezing all day.
He caught a flu strain that was going around the office.

Some alternatives from our editors:

caught the flu
got the flu
contracted the flu
came down with the flu
fell ill with the flu

caught flu

This phrase is correct but less common than 'caught the flu.'

This phrase is also used to indicate that someone has contracted the flu virus. It is grammatically correct but less common than 'caught the flu.'

Examples:

She caught flu after being exposed to sick people at the hospital.
He caught flu every winter until he got the flu shot.
They caught flu from their children who brought it home from school.

Alternatives:

caught the flu
got the flu
contracted the flu
came down with the flu
fell ill with the flu

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caught a flu vs caught flu

caught a flu

caught flu

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