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UK health officials have found traces of a vaccine-derived version of the virus in sewage samples in parts of London and say it is 'likely' transmitting within the community.Can I take the polio vaccine if I missed out as a child? What are the virus' symptoms?
UK health officials have found traces of a vaccine-derived version of the virus in sewage samples in parts of London and say it is 'likely' transmitting within the community. Read more