Skip to main content

Table 1 Per-contact influenza infection transmission probabilities within contact groups

From: Reactive strategies for containing developing outbreaks of pandemic influenza

Household1

 

Contact Group

Transmission Probability

Child-to-Child

0.8

Child-to-Adult

0.3

Adult-to-Child

0.3

Adult-to-Adult

0.4

Community 2

 

Pre-schooler

0.000005

School child

0.000005

Adult (ages 19–52)

0.000075

Adult (ages 53+)

0.000055

Daycares/Playgroups 2

 

Daycares

0.028

Playgroups

0.018

Schools 2

 

Elementary schools

0.012

Middle schools

0.011

High schools

0.010

Workgroups

0.010

  1. 1. Within households, the probability that a symptomatic child (age 18 years or less) infects a susceptible child is 0.8; that a symptomatic child infects a susceptible adult (at least 19 years old), or that a symptomatic adult infects a susceptible child, is 0.3; that a symptomatic adult infects a susceptible adult is 0.4 [16].
  2. 2. Probability that a susceptible person in the age or school group is infected through contact with a symptomatic person in the group.