A man who has had the first case of polio in the US for almost a decade has the same strain that has also been found in London and Jerusalem this year, say scientists.
The polio virus was present in wastewater in a New York City suburb a month before health officials there announced a confirmed case of the disease last month, state health officials said, urging residents to be sure they have been vaccinated.
As the disease was found in wastewater samples collected in June, it means the virus was present in the community before the Rockland County adult's diagnosis was made public July 21.
