It's National Blood Week and ITV Border has previous looked at what happens and who benefits when blood is donated.
Amy Dunsmuir has been to the Cumberland Infirmary in Carlisle, to see what happens to the blood when it reaches the hospital:
More top news
A number of roadwork projects in Cumbria will be temporarily lifted over the Bank Holiday Weekend, to make travel easier.
There will be major delays to almost all railway services in the region over the three days. Replacement buses will be operating.
Police and local authorities in Cumbria are issuing road traffic and safety advice ahead of the Appleby Horse Fair, which begins next week.