Answer the call. Build solutions that fight back. In a very short period of time, COVID-19 has completely upended our collective way of life. But we can fight back – with technology. The 2020 Call for Code Global Challenge has expanded to take on COVID-19 in addition to climate change. Innovators and problem solvers: Join us to create open source solutions that make an immediate and lasting impact. Submissions are open through July 31, 2020.