From: Age-specific contacts and travel patterns in the spatial spread of 2009 H1N1 influenza pandemic

Variable | Definition |
---|---|

α
| Children fraction of the population |

q
_{
a
}, q
_{
c
}
| Average number of contacts per unit time established by individuals in the children and adult classes, respectively |

η = q
_{
a
}/q
_{
c
}
| Ratio of the average number of contacts |

ε = ε
_{
c
}
α = ηε
_{
a
}(1 − α)
| Total fraction of contacts across age classes |

r
| Children fraction of the traveling population |