Explainer: what is herd immunity?
- Written by The Conversation Contributor
Protecting the herd means a certain proportion of the population has to be immunised.Flickr/Princessrica, CC BY-SAThe recent outbreak of chickenpox in a Melbourne primary school is a reminder that even in a country like Australia where immunisation rates are high, children and adults are still at risk of vaccine-preventable diseases.
Outbreaks such...









