Figure 4
From: A novel indicator in epidemic monitoring through a case study of Ebola in West Africa (2014–2016)
Tracing the extreme points of \(E/S\) ratio and CPs for various cases of S(0) from 20,000 to 200,000. (a, c) Several \(E/S\) ratios are estimated for \(S(0)=\text{20,000}\) to 80,000 in increments of 20,000 units for Guinea and Sierra Leone. The maximum value appears near the 243rd day for \(S(0)=\text{20,000}\) and the 238th day for \(S(0) =\text{80,000}\) for Guinea. For Sierra Leone, it appears near the 210th day for \(S(0)=\text{20,000}\) and the 189th day for \(S(0) =\text{80,000}\) (b, d) (above): These graphs illustrate the dates when the maximum values of \(E/S\) appear as the value of S(0) changes from 20,000 to 200,000. The days on which the \(E/S\) values reach their maximum are March 25, 2014 for Guinea and May 27, 2014, for Sierra Leone. They converge to the 237th day for Guinea and the 185th day for Sierra Leone. (b, d) (below): The Cross Points are calculated from the two transmission rate curves. Rt = 1 is constant at 241st day for Guinea and 189th day for Sierra Leone for S(0).
