Machine learning COVID-19 detection from wearables. Issue 4 (April 2023) - Nestor, Bret; Hunter, Jaryd; Kainkaryam, Raghu; Drysdale, Erik; Inglis, Jeffrey B; Shapiro, Allison; Nagaraj, Sujay; Ghassemi, Marzyeh; Foschini, Luca; Goldenberg, Anna