Sarah Marshall from Banbury was diagnosed with pulmonary hypertension in 2013.
Here, she explains how her life changed over night, and why she had to give up her job as a primary school teacher.
Tess Jewson, who lives in Essex, was still at college when she was diagnosed with pulmonary hypertension in 2008. Here, Tess explains what it is like to live with PH today.
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