This is a cool visual demonstration of the concept. The concept of herd immunity, and how it breaks down, especially due to personal opinions, is my main resea

This is a cool visual demonstration of the concept. The concept of herd immunity, and how it breaks down, especially due to personal opinions, is my main research interest. I've published a couple of papers over the years, for those who are interested (all are open access): The effect of opinion clustering on disease outbreaks http://rsif.royalsocietypublishing.org/content/5/29/1505.full.pdf+html http://rsif.royalsocietypublishing.org/content/5/29/1505.ful... Assessing Vaccination Sentiments with Online Social Media: Implications for Infectious Disease Dynamics and Control http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1002199 http://www.ploscompbiol.org/article/info:doi/10.1371/journal... Complex Social Contagion Makes Networks More Vulnerable to Disease Outbreaks http://arxiv.org/abs/1211.0518 http://arxiv.org/abs/1211.0518