 DURHAM, N.C., May 05, 2021 GLOBE NEWSWIRE -- Heat Biologics, Inc. Heat NASDAQ: HTBX, a clinical-stage biopharmaceutical company focused on developing first-in-class therapies to modulate the immune system, including multiple oncology product candidates and a novel COVID-19 vaccine, today provided financial, clinical and operational updates for the first quarter ended March 31, 2021. 