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Sustained detection of type 2 poliovirus in London sewage between February and July, 2022, by enhanced environmental surveillance - The Lancet
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Traces of polio virus found in London sewage as health officials declare national incident | UK News | Sky News
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Polio vaccine catch-up campaign for London as sewage surveillance findings suggest reduced transmission - GOV.UK
Discovery of polio virus in London sewers prompts urgent vaccination of children - World Socialist Web Site
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The discovery of the polio virus in Britain proves we can never let our guard down | Andrew Pollard | The Guardian
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