Estimated parameters for country-specific model (median posterior with 95% credible interval indicated in parenthesis).

*When fitting ILI weekly incidence per 100,000 population, reporting rate was adjusted from sample population size (100,000) to country population size to provide estimates comparable with those reported for confirmed cases. When fitting ILI weekly incidence per 10,000 consultations, reporting rate was adjusted using a range of sample population size (10,000–100,000).