Chairunnisa, Miftah, Ananti Setya P P, and Dewi Rahmawaty A P. 2021. “Systematic Review : Immunoglobulin Concentration in Breast Milk As a Body Defense Against Sars-Cov-2”. Jurnal Ners Dan Kebidanan (Journal of Ners and Midwifery) 8 (2):255-62. https://doi.org/10.26699/jnk.v8i2.ART.p255-262.