?:abstract
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The global threat of COVID-19 is continued with no commercially available vaccine or drug yet While the application of convalescent therapy is usually beneficial, for critically ill patients, the detrimental effect associated with some antibodies is also reported The immunoglobulin G (IgG) antibody in response to severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection is described, albeit the lack of defining whether the difference in subclasses has a beneficial or detrimental role IgG2 has limited ability to activate innate immune cells and complement-mediated inflammation, which have been inversely described in SARS-CoV-2 pathogenesis The expansion of IgG2 is promoted by interferon gamma (IFN-gamma);however, there is a low level of IFN-gamma in COVID-19 patients Therefore, this review describes the importance of targeting IgG2, with IFN-gamma in minimizing the SARS-CoV-2 associated inflammation, and may provide insight into the design of vaccine or antibody-based therapies to COVID-19 disease
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