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There is no substitute for blood. If someone losses a lot of blood in a surgery or in an accident. So donate blood every year to a hospital. Blood donation is a great thing. Each pint of blood can save three lives. The age limit for blood donation is 17 to 66. Can't we save at least three people by just donating blood.It is very simple. Can't we just waste a few minutes of your precious time for blood donation ? Blood donation is more precious than Time. So please donate blood and save three lives at the least.