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. 2016 Dec 13;7:13849. doi: 10.1038/ncomms13849

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Copyright © 2016, The Author(s)

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Interpretation of parameter and expression . is the average number of females horizontally infected by a son and the male infections he will give rise to and results from adding up all possible transmission events to females. is the effective rate of vertical transmission. It results from calculating the probability of vertical transmission to sons and daughters and horizontal transmission from son to females with whom he establishes contact.

Inline graphic — Interpretation of parameter and expression . is the average number of females horizontally infected by a son and the male infections he will give rise to and results from adding up all possible transmission events to females. is the effective rate of vertical transmission. It results from calculating the probability of vertical transmission to sons and daughters and horizontal transmission from son to females with whom he establishes contact.