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SARS-CoV-2 suppresses host innate immunity SARS-CoV-2, the virus that causes COVID-19, blocks the processes of innate immune activation that normally direct the production and/or signaling of type I interferon (IFN-I) by the infected cell and tissues. IFN-I is a key component of host innate immunity that is responsible for eliminating the virus at the early stage of infection, as summarized in a recent review article in Journal of Interferon & Cytokine Research (JICR). By suppressing innate immunity, the virus replicates and spreads in the body unchecked, leading to the disease known as COVID-19. SARS-CoV-2 utilizes various approaches to evade host IFN-I response, including suppression of IFN-I production and IFN-I signaling. Viruses defective in antagonizing IFN-I response, in combination with replication-defective mutations, could potentially be developed as live attenuated vaccine candidates. ....