This book constitutes selected and revised papers from the Second International Conference on Digital Health and Medical Analytics, DHA 2020, held in Beijing, China, in July 25, 2020. The 5 full papers and 7 short papers presented in this volume were thoroughly reviewed and selected from 75 submissions. The papers present discussion on such topics as social networks, analytics and engagement with health devices, big data, public health surveillance, persuasive technologies, epidemic intelligence, participatory surveillance, emergency medicine, serious games for public health interventions and automated early identification of health threats and responses.