Fig. 5
From: Design of effective outpatient sentinel surveillance for COVID-19 decision-making: a modeling study
Performance of sentinel surveillance and hospital admissions indicators under scenarios when two age groups (below and above 40 years of age) simultaneously experience a transmission hike or when a transmission hike occurs 14 days earlier in people below 40 years of age. (A) Transmission rate profile for the two scenarios modeled in the age-structured SEIR model. (B) The cumulative distribution of the day on which criteria to trigger the alarm was met, using each indicator under the two transmission hike scenarios. Simulations are conducted on a population of 2.5Â million experiencing a moderate transmission hike with 500 realizations