Defund EcoHealth Alliance Act This bill prohibits the award of federal funds to EcoHealth Alliance, Inc. This is a nonprofit research organization that studies coronaviruses in bat populations and other environmental health concerns. The Government Accountability Office must also audit federal funds provided to that organization over the past decade. The audit must include the amount of those funds provided by EcoHealth Alliance to China, the Chinese Communist Party, or the Wuhan Institute of Virology.