Polio booster vaccine to be offered to children in London after more virus found in sewage water
CBSN
British health authorities say they will offer a polio booster vaccine to children aged 1 to 9 in London, after finding evidence the virus has been spreading in multiple regions of the capital, despite not confirming any cases of the paralytic disease in people.
In a statement on Wednesday, Britain's Health Security Agency said it had detected polio viruses derived from the oral polio vaccine in sewage water from eight boroughs of London, but had not identified any cases.
Its analysis of the virus samples suggested "transmission has gone beyond a close network of a few individuals" but that it had not found anyone infected with the virus. According to the World Health Organization, only one in 200 polio infections leads to paralysis; most people don't show any symptoms.
