Gabriel Talasso

 Consider the epidemic curves shown in the figure and the concepts of SI, SIS, SIR models in complex networks.  Evaluate the following statements: I. The Epidemic 1 curve can represent an epidemic following the SI model, the Epidemic 2 curve follows the SIS model, and the Epidemic 3 curve corresponds to the SIR model. II.  The Epidemic 1 and the Epidemic 2 curves can both represent an SIS model, differing only in their transmission and recovery rates. III. From the endemic equilibrium observed in the Epidemic 2 curve (~66%), we can infer that the transmission rate β is approximately three times lower than the recovery rate μ, i.e., β ≈ μ/3. Which alternative is correct? A) Only statement I is true. B) Only statement II is true. C) Only statements I and II are true. D) Only statements I and III are true. E) None of the above. Original idea by: Gabriel Ukstin Talasso