a drug to treat cystic fibrosis, that became available on the nhs in england last year, is transforming lives. medics at the royal papworth hospital in cambridge say kaftrio is having an impact that some have described as "mind—blowing". the bbc�*s science correspondent richard westcott went to meet laura — who had been told she may not live beyond 30, but who has now celebrated that birthday in good health, and has even started a family. this is life with cystic fibrosis. a few months ago laura filmed herself exhausted by a simple walk. the transformation is incredible. after taking a newly available drug, kaftrio, she has got her life back and created a new one. laura, when this drug first came out, we all heard how amazing it was, but did you dare to hope it could have this kind of impact on your life? not really. because of how you feel with cystic fibrosis and how scary it can be, i just thought two tablets in the morning, a tablet at night, how can that do everything everybody is telling me it is doing? it made me feel so much better,