Fig. 2
From: Impact of lockdown on COVID-19 epidemic in Île-de-France and possible exit strategies
Compartmental model. S, susceptible; E, exposed; Ip, infectious in the prodromic phase (the length of time including E and Ip stages is the incubation period); Ia, asymptomatic infectious; Ips, paucysymptomatic infectious; Ims, symptomatic infectious with mild symptoms; Iss, symptomatic infectious with severe symptoms; ICU, severe case admitted to ICU; H, severe case admitted to the hospital but not in intensive care; R, recovered; D, deceased