as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
explain the concept of 'herd immunity'.
user
herd immunity is a concept in public health that describes how a population can become immune to a certain disease. when a large percentage of the population has immunity to a certain disease, either through vaccination or having already contracted the disease, the spread of the disease is limited and it becomes more difficult for an infection to spread from person to person.
assistant