 EMERYVILLE, Calif., Sept. 09, 2021 GLOBE NEWSWIRE -- Gritstone bio, Inc. Nasdaq: GRTS, a clinical-stage biotechnology company developing the next generation of cancer and infectious disease immunotherapies, today announced that it will host a data update webcast for investors and analysts during the European Society of Medical Oncology ESMO Annual Meeting 2021, September 17, 2021 at 1:30 p.m. ET. 