The science of health communication | is becoming as central to the field of | environmental health as the science of | epidemiology. Within the 21st century, such | events as Hurricane Katrina, H1N1 influenza, | and concerns about chemical exposure in imported drywall have demonstrated the value | of communication as a means of protecting public health. When such events occur, health | professionals must seek disease control interventions but also address audiences’ information needs. Health communication science is | an essential underpinning for such activities.