Knowledge and Attitude Level of Medical Students from Universitas Sumatera Utara about The Importance of COVID-19 Vaccine. JIMKI: Jurnal Ilmiah Mahasiswa Kedokteran Indonesia, [S. l.], v. 10, n. 1, p. 1–10, 2022. DOI: 10.53366/jimki.v10i1.509. Disponível em: https://jimki.bapin.or.id/main/article/view/509. Acesso em: 15 may. 2026.