 TORONTO and HOUSTON, Aug. 04, 2021 GLOBE NEWSWIRE -- Medicenna Therapeutics Corp. Medicenna or the Company NASDAQ: MDNA TSX: MDNA, a clinical stage immuno-oncology company, today announced that it will host a conference call and live webcast on August 13, 2021 at 8:30 AM ET to report its first quarter fiscal 2022 financial results and operational highlights. 