Leo Jumadi Simanjuntak (2023) “Relationship Between COVID-19 Vaccination Status and Maternal, Neonatal, and Placental Outcomes”, Jurnal EduHealth, 14(02), pp. 1223–1226. Available at: https://ejournal.seaninstitute.or.id/index.php/healt/article/view/3157 (Accessed: 10 November 2026).