One of the challenges to securing the participation of patients in clinical trials can be simple geography. Sanguine Biosciences is seeking to tear down that barrier to participation by using mobile technology to bring clinical trials to patients. The company recently partnered with Vir Biotechnology to complete a COVID-19 clinical study aimed at better understanding the biology of the disease by sending healthcare personnel to collect blood samples from patients at their homes. We spoke to Brain Neman, co-founder and CEO of Sanguine, about it use of digital health technologies, how the company works, and its recent collaboration with Vir Biotechnology for a COVID-19 study.