The Advanced Research Projects Agency for Health (ARPA-H) has posted a funding opportunity for its Antigens Predicted for Broad Viral Efficacy through Computational Experimentation (APECx) Program. This program aims to support the development of antigens that have broad efficacy against viral infections through computational experimentation. ARPA-H anticipates multiple awards and award types resulting from this announcement. Interested parties are invited to review the attached APECx Research & Development Solicitation No. 75N99224R00001. Abstracts are due on December 15, 2023, at 9:00 AM ET, and proposals will be invite-only, with a deadline of February 16, 2024, at 5:00 PM ET. To participate, an abstract must be submitted to be invited to submit a proposal. For more information about APECx, please visit the following link: https://arpa-h.gov/engage/programs/apecx/. Please note that the APEX Accelerators government contracting resource for small businesses notice is included on all SAM.gov postings and is unrelated to the ARPA-H APECx program. For additional information and to access the Research & Development Solicitation, please visit the following link: https://sam.gov/opp/6254723d96854573a6643803eefcf3c1/view.