A Note on the Risk of Infections Invading Unaffected Regions

Table 1

Model variables and parameters, their biological meaning, and values for the measles case. The parameter values were taken from [18].

Parameter/Variable	Meaning	Value
	Density^+ of susceptible individuals	20% of Italy Population
	Density of infected travelers
	Density of infected individuals
	Density of individuals	Italy Population
	Human natural mortality rate	1.10×10^−3 month^−1
	Additional Measles mortality rate	6.00×10^−5 month^−1
	Measles recovery rate	3.33 month^−1
	Potentially infective contact rate	10

means “number of individuals per unit area.”