Dynamics of H1N1-related risk perceptions and H1N1 confirmed cases, April 28 - May 26 2009. The lines show the mean score of perceived risk scale, the proportion of respondents who predicted over 1000 deaths, and the cumulative H1N1 cases. Sources for H1N1 cases: CDC .
Ibuka et al. BMC Infectious Diseases 2010 10:296 doi:10.1186/1471-2334-10-296