Donate blood to save life

I gave blood to a dying patient.It is better than saving a life by donating blood to people. What can be done in this world. It is your duty to save a life through donating a little blood. And if a blood donation of a medical science is given to donate blood, then there is no harm to the health of the person. A healthy person can donate blood after three months. An invaluable resource. We all save lives by donating blood of the patient. Everybody's duty Helping other people to live. Humanity will save lives in the world.