Determinants of Influenza Transmission in South East Asia: Insights from a Household Cohort Study in Vietnam
Figure 1
Final size data and methods to estimate transmission parameters.
A. Example of final size data for a household of size 4. Subjects 1 and 4 were infected; subject 3 was not; diagnostic for subject 2 was missing. B. Example of digraph consistent with the final size data. For inference, data are augmented with a digraph (blue arrows) that informs on the transmission process. If there is an edge from the community to subject i, subject i was infected (this is the case for subject 1). If there is an edge from subject j to subject i, it means that if subject j was infected then subject i was infected too. C. Another example of digraph consistent with the data. We note that certain digraphs may allow more than 1 possible route of transmission. For example, subject 4 could have been infected in the community or by subject 2. D. Example of digraph that is not consistent with the data. This is because this digraph would imply that subject 3 was infected but subject 4 was not.