The Blood Bank has lost approximately 500 units per month due to the scrapping of the blood chit system.The public has been reluctant to donate blood since the chit system was discontinued, according to Justin Sankar of the Blood Transfusion Unit.Sankar who is an acting medical laboratory technician III at the unit explained that under the chit system, blood donors were given a chit which they could use to retrieve their blood in emergencies.When the practice was stopped, the public became hesitant to donate blood fearing if they needed it they could not get it back, he said.Soca artiste Denyse Belfon lent her support to collection drive and donated blood to the cause.