Phase 3 Inhaled Novaferon Study in Hospitalized Patients With Moderate to Severe COVID-19

This study is a randomized, double-blind, multicenter, placebo-controlled trial to evaluate the safety and efficacy of a novel therapeutic agent, Novaferon, in hospitalized adult patients diagnosed with COVID-19. The study is comprised of two cohorts: * Cohort A: This is a blinded safety lead-in comprising two arms. 40 patients will be randomized on a 1:1 basis to receive either Novaferon or matched placebo via a commercial nebulizer, plus Standard of Care (SOC) * Cohort B: This is the main portion of the study, which comprises two arms. Up to 874 patients will be randomized on a 1:1 basis to receive either Novaferon or matched placebo via a commercial nebulizer, plus SOC