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Showing posts from March, 2021

Herd Immunity: What it is and why it matters

As countries continue to administer various COVID-19 vaccines to their citizens, the words "herd immunity" are increasingly thrown around in many circles. Let us examine the meaning and benefits of herd immunity. What is herd immunity? A.W Hedrich , a researcher studying the spread of measles in the United States between 1900 and 1931 observed that as more infected children recovered from measles and became immune to the disease, the rate of transmission of measles decreased and the children who had no immunity were protected. He then coined the term "herd immunity" to describe this phenomenon. Credit - Wikipedia Herd immunity, also known as community protection , can be defined as a form of indirect protection from some infectious diseases when a sufficient proportion of a population has