WASHINGTON—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 on Monday.
The discovery of the disease from wastewater samples collected in June means the virus was present in the community before the Rockland County adult’s diagnosis was made public July 21.
The Centers for Disease Control and Prevention (CDC) said in an emailed statement that the presence of the virus in wastewater indicates there may be more people in the community shedding the virus in their stool….