Table 1 Population groups variables

α

group 1 fraction of the population

]0;1[

q₁,q₂

average number of contacts established by individuals in group 1 and 2

$\eta =\frac{q_2}{q1}$

ratio of the average number of contacts

]0;1]

ε

total fraction of contacts across groups

]0;min(α,η(1 - α))]

r

group 1 fraction of traveling population

]0;1]