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Immunisation and 'herd immunity'
This is how vaccines work, why theyβre important and what the phrase βherd immunityβ actually means.
Produced and edited by Elise Wicker; art direction by Alice GreniΓ©; filming by Derrick Evans; executive production by Lorna Hankin and Charlie Newland
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The World Vaccination Report—The World Vaccination Report
Documentaries, debates and analysis from across the world
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