Fig. 3: Episodes with symptoms reported and symptom reporting rate.
From: Engaging a national-scale cohort of smart thermometer users in participatory surveillance

Vertical lines are placed at the beginning of each pandemic period. Panel (a) shows the number of episodes with symptoms reported among febrile or all episodes. Panel (b) shows the symptom reporting rate among febrile or all episodes. The red lines are the episodes with symptoms reported and symptom reporting rate among febrile episodes, and the green lines are the episodes with symptoms reported and symptom reporting rate among all episodes. The points with dates are the relative high and low reporting rates during the pandemic.