WINDARTO, Wira Widjaya. HERD IMMUNITY DAN COVID-19. Prosiding FK UC, [S. l.], v. 1, n. 1, p. 4, 2022. Disponível em: https://ojs.somebut.my.id/index.php/PFK2021/article/view/2513. Acesso em: 19 feb. 2026.