Blood Donation Knowledge

Blood Donation: Information You Can Trust

Learn about blood donation, donor eligibility, the donation process and blood safety. DonorNearby uses reliable sources, including Government of India and WHO resources, for this educational section.

Blood Donation

Understand the donation process

Read about who may be eligible, what happens at a blood centre, how to prepare and what to expect afterwards.

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Blood Groups

Understand the eight common ABO/Rh types

Learn what A, B, AB and O mean, how Rh-positive and Rh-negative status fits in, and how red-cell compatibility works.

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Medical information notice

These pages provide general educational information. They do not determine whether you are medically eligible to donate blood. Final eligibility is assessed by the blood centre or qualified medical staff according to applicable donor-selection rules.