All week we've been telling you about ITV's From The Heart campaign to try and encourage more people to sign up to the organ donor register.
ITV News London has today had exclusive access to the Royal London Hospital in Whitechapel, where around 80 transplants are carried out each year.
From there, Ria Chatterjee reports.
Vincenzo has been transformed from a patient so sick he could not wash his face to a man who strides confidently with a gleam in his eye.
Alex Smith was diagnosed with a heart problem but after receiving a transplant he feels he has been given the "greatest gift of life."
While 90% of people believe donating an organ is the right thing to do - only 30% are signed up to the organ donor register.