 BOSTON, April 16, 2021 GLOBE NEWSWIRE -- Aprea Therapeutics, Inc. Nasdaq: APRE, a biopharmaceutical company focused on developing and commercializing novel cancer therapeutics that reactivate the mutant tumor suppressor protein, p53, today announced that it will host a virtual RD Day at 1:00 p.m. ET on Thursday, April 22, 2021. 