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<p>The NHS COVID Pass shows an individual’s COVID-19 vaccination details or test results
to manage the risk of transmission and provide additional reassurance that events
organisers are taking measures to reduce these risks. The evidence shows that use
of the Pass does reduce transmission at large events as the vaccines are effective
at preventing infection. There is also further evidence that should vaccinated individuals
become infected there is a reduced risk of transmission to others of approximately
40 to 45% after one dose.</p>
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