On December 4?5, 2019, the National Academies of Sciences, Engineering, and Medicine held a 1.5-day public workshop titled Exploring the Frontiers of Innovation to Tackle Microbial Threats. The workshop participants examined major advances in scientific, technological, and social innovations against microbial threats. Such innovations include diagnostics, vaccines (both development and production), and antimicrobials, as well as nonpharmaceutical interventions and changes in surveillance. This publication summarizes the presentations and discussions from the workshop.