Assessing Vaccination Sentiments with Online Social Media: Implications for Infectious Disease Dynamics and Control
Figure 2
(A) Proportion of negative sentiments p(-) in the network communities. Dashed line shows overall proportion in the opinionated network.
The proportions of negative and positive sentiments are significantly different from the overall proportions in the entire opinionated network (with the exception of community E). (B) Effect of positive assortativity index (r) on relative risk increase (compared to risk at r∼0) of disease outbreaks that infect at least 3% of the population. Blue line shows best fit of linear regression (confidence interval based on standard error). (C) Relative risk increase (compared to risk at r∼0) of disease outbreaks of a given fraction of the population (on horizontal axis) for two values of assortativity index (r), 0.075 (red) and 0.145 (green). Note that the latter corresponds to r found in the opinionated network (see main text).