How to calculate number of cells with dates within the last 15 days?

I'm trying to calculate how many rows on my project sheet have a "completed" status in the "project / task health" column and also have a date in the "completed date" column within the last 15 days.

This is the formula I am trying to use:

=COUNTIFS([Project / Task Health]:[Project / Task Health], "completed", [Completed date]:[Completed date], <=TODAY(), [Completed date]:[Completed date], >=TODAY(-15))

Thank you!

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