London children aged one to 11 will be offered polio vaccines as part of a catch-up campaign, to boost the city’s lagging vaccination rates against the deadly virus. Health officials warned last year that there had been “some transmission” of the virus in the capital after detecting poliovirus in sewage samples across North and East London. In response, London children aged between one and nine who had already been vaccinated were offered a booster dose of the polio vaccine. View More