Citations : Difference in levels of SARS-CoV-2 S1 and S2 subunits- and nucleocapsid protein-reactive SIgM/IgM, IgG and SIgA/IgA antibodies in human milk

SARS-CoV-2 is the novel coronavirus discovered in 2019 (2019-nCoV) that is responsible for the severe acute respiratory syndrome (SARS) pandemic. The coronavirus disease 2019 (COVID-19) was first observed in China. SARS-CoV-2 is responsible for pandemic-level infections globally, including the United States [1]. To induce COVID-19, the spike 1 (S1) subunit attaches to angiotensin-converting enzyme-2 (ACE-2) receptors on the cellular surface of the human respiratory tract [2].