Health
Mutating coronavirus: reaching herd immunity just got harder, but there is still hope – The Conversation UK
New variants will push the number needed to reach herd immunity up.
A year after the first cases of COVID-19 were found in China, mass vaccination programmes are now offering a chance to end the pandemic. At the same time, new strains, some of which appear to be more infectious than the original one, are threatening to derail progress in fighting the disease.
One way to capture the effectiveness of our effort to fight the virus is to consider the concept of herd immunity. During an epidemic, people become infected and those who survive usually become immune. Resistance…
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