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Cystic Fibrosis Trust

CF Week

Join us between 19–25 June for the biggest, brightest and best CF Week yet. Remember to don your sunniest outfit for Wear Yellow Day on Friday 23 June!


Dig deep

Play a lottery, join the raffle - or just make a good old-fashioned donation!

Donate now

Mellow yellow

Find out more about our famous #WearYellowDay selfies, including some inspiration from last year's day.

Snap a Yelfie

Travel back in time...

Check out a summary of all the exciting research we explored as part of last year's CF Week, when we asked:

What the CF?!