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What Is Herd Immunity? And Why Is It So Important?

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  Since the corona virus outbreak, several words have entered the common person's lexicon: social distancing, pandemic, self-isolation, asymptomatic, etc. The pandemic has also introduced people to the concept of "herd immunity," a term commonly used in conversations about vaccination. What does it mean? And how is it relevant in the times of COVID-19? Here's all you need to know. What is herd immunity? Herd immunity is when a significant portion of the population has developed immunity against a pathogen. This helps limit the spread of the pathogen through the population by breaking the chain of transmission. For e.g., if 80% of the population is immune, four out of five people who encounter an infected person will not get sick and will hence not transmit the disease further. Why is it so important? Even though you may feel confident about your immune system's capability to fight off an infection, that's not the point. Herd immunity offers some protection for...

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