Hysteresis Loop in Public Health (image) Dartmouth College Share Print E-Mail Caption Social imitation dynamics of vaccination can exhibit hysteresis. This figure illustrates a hysteresis loop in relation to outbreaks of measles and other childhood diseases in Europe and North America. Credit Figure courtesy of Feng Fu and Xingru Chen. Usage Restrictions Figure courtesy of Feng Fu and Xingru Chen. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.