One person has become severely ill after contracting polio in New York state, and health experts have found traces of the virus in wastewater in two counties.
Denis Nash, distinguished professor of epidemiology at the City University of New York Graduate School of Public Health, joins "CBS News Mornings" to discuss.
Federal health officials have arrived in New York over concerns that polio may be spreading. The virus has been found in multiple..
Health officials are taking extra precautions after polio was found in New York City wastewater.
Polio was found in New York suburb wastewater a month before health officials confirmed a case in July. Veuer’s Maria Mercedes..
