E. S. Dasopang, D. Natalia Siahaan, F. Hasanah, S. Handayani Lubis, Y. . Yuni M, and R. Pane, “The Relationship Between Covid-19 Vaccination And The Incidence Of Covid-19 At The Hospital Putri Hijau Hospital, Medan”, IJHP, vol. 4, no. 3, pp. 472–479, Jun. 2024.