Haemovigilance is regarded to be the series of monitoring measures that embody the complete transfusions procedure ranging from monitoring of blood to the prevention of blood-related disease. The time period hemovigilance originated from the term “pharmacovigilance”, which contains operations and strategies to acquire intelligence precious in overseeing pharmaceutical goods, mainly adverse drug responses in humans, and to scientifically determine such data. This system is additionally an elemental phase of quality control in a blood system, bringing about corrective and preventive measures, and for the perpetual development of the high-quality and protection of blood products and the transfusion process. This follows the reporting device which consists of the enhancement of affected person safety. It additionally consists of mastering from disasters that end result in sure system modifications and hence prevents the related errors. It additionally consists of all key events and organizes numerous operations among blood banks, transfusion facilities, and health centre caregivers. The majority of affluent countries now use Haemovigilance to track adverse responses and occurrences related with blood donation and transfusion. This review focused the mild on haemovigilance: the blood transfusion procedure.