A Phase 3 Randomized Double Blind Efficacy and Safety Study of Oral Polio Vaccine and NA-831 for Covid-19

Early clinical studies showed that besides protecting against poliomyelitis, oral polio vaccine (OPV) reduced the number of other viruses that could be isolated from immunized children, compared with placebo recipients. Both poliovirus and coronavirus are positive-strand RNA viruses; therefore, it is likely that they may induce and be affected by common innate immunity mechanisms. Recent reports indicate that COVID-19 may result in suppressed innate immune responses. Stimulation by live attenuated oral polio vaccines could increase resistance to infection by the causal virus, severe acute respiratory syndrome-SARS-CoV-2. It has been discovered that SARS-CoV-2 viruses (Covid-19) can directly invade the nervous system of patients, instead of injuring the nervous system through the immune response. Increasing evidence suggests that infection with SARS-CoV-2 causes neurological deficits in a substantial proportion of affected patients. It was observed that patients surviving COVID-19 are at high risk for subsequent development of neurological disease and in particular Alzheimer's disease. NA-831 is a new neuroprotective and neurogenesis drug that has been demonstrated its promising safety and efficacy in Phase 2A for the treatment of early onset ofAlzheimer's disease. NA-831 in oral formulation is well tolerated NA-831 with no adverse effects. The Phase 3 clinical trial will evaluate the safety and efficacy of OPV with and without NA-831 versus placebo.