Virpax Pharmaceuticals  Virpax Pharmaceuticals (VRPX) - a company specializing in developing product candidates for pain management, CNS and anti-viral indications, announced the receipt of a written pre-investigational new drug (pre-IND) response from the U.S. Food and Drug Administration (FDA) for MMS019, its patented and proprietary high-density molecular masking spray under development for use . . . This content is for paid subscribers. Please click here to subscribe …