Table 2.

Models development process

Model	Stocks	Descriptions
1 (SIR Model)	Susceptible – Infected - Recovered	Simple SIR model with constant contact rate over the time
2	Added Stock: Death	Capturing the death rate and considering the reduction of contact rate over the time
3	Added Stock: Quarantined	Investigating the influence of quarantining the infected on reducing the death rate
4	Added Stock: Perception of Death	Capturing the increase of situational awareness which leads to more safe burials
5	Added Stocks: Asymptomatic and Symptomatic	Capturing the incubation time to separate the symptomatic individuals from asymptomatics, and more precisely define the infection rate
6 (Final Model)	Added Stock: Public Attention	Studying the influence of public attention on contact rate by incorporating twitter data trends