The Center for Health Security (CHS) at Johns Hopkins University focuses on reducing biological risks, including Global Catastrophic Biological Risks (GCBRs), through research, policy advocacy, and education. It emphasizes the importance of pandemic preparedness, biosecurity, and the development of medical countermeasures. CHS has played a significant role in COVID-19 response and continues to work on improving international biosafety norms and vaccine development for future pathogens.