Eka Sudiwati, N. L. P., Kusuma, R. Y., Panggayuh, A. . and Ariani, N. L. . (2022) “The Covid-19 Antibody Titer of Convalescence Plasma Repeated Donors at Red Cross Indonesia of Tulungagung Regency”, International Journal of Medical Science and Clinical Research Studies , 2(12), pp. 1388–1391. doi: 10.47191/ijmscrs/v2-i12-04.