I have flu. vs I have a flu.

Both phrases are correct, but they are used in different contexts. 'I have flu' is commonly used in British English, while 'I have a flu' is more common in American English. The presence or absence of the article 'a' before 'flu' is a matter of regional variation.

Last updated: March 12, 2024

I have flu.

This phrase is correct and commonly used in British English.

This phrase is commonly used in British English to indicate that someone is suffering from the flu.

Examples:

I have flu and need to stay in bed.
She caught flu from her colleague.
He's been off work with flu for a week.
They say you can't get flu twice in one season.
I think I'm coming down with flu.

Alternatives:

I have the flu.
I have a case of the flu.
I have come down with the flu.
I am suffering from the flu.
I am down with the flu.

I have a flu.

This phrase is correct and commonly used in American English.

This phrase is commonly used in American English to indicate that someone is suffering from the flu.

Examples:

I have a flu and need to see a doctor.
She caught a flu virus while traveling.
He's been off work with a flu bug for a week.
They say you can't get a flu shot too early.
I think I'm coming down with a flu.

Alternatives:

I have the flu.
I have a case of the flu.
I have come down with the flu.
I am suffering from the flu.
I am down with the flu.

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I have flu. vs I have a flu.

I have flu.

I have a flu.

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