Jon Pangarapan Saragih, Bintang Sinaga, Zainuddin Amir Departemen Pulmonologi dan Ilmu Kedokteran Respirasi Fakultas Kedokteran Universitas Sumatera Utara, RSUP H. Adam Malik, Medan Abstract Background: Vitamin D is known to have an important role in macrophage activation and the subsequent restriction of Mycobacterium tuberculosis growth, and it has been implicated as a risk factor for […]