This book discusses how the Covid pandemic has reshaped investment screening mechanisms, investment law and arbitration. Contributions from leading academics and practitioners offer a fresh perspective on the reform of the ISDS mechanism and investment treaties; security and public order risks in FDI screening; the application of treaty standards and customary law defences; and the critical role of scientific data in investment arbitration. With rare insights and unpublished data, this book is your essential guide to understanding the resilience of the investment regime in these challenging times.