Several hundred cases of undiagnosed polio were circulating in the US, according to a senior official with the Centers for Disease Control and Prevention (CDC).
Several hundred cases of undiagnosed polio are still circulating in the United States, according to a senior official with the Centers for Disease Control and Prevention (CDC). This follows the news of an unvaccinated man paralyzed by the virus in New York, last month, a first in nearly a decade in the country. The last known case was in 2013.
‘About 75% of people who were infected by polio did not have any symptoms, but they have been silently spreading the contagious viral disease to other people.’
The New York case is "just the very, very tip of the iceberg" and an indication there "must be several hundred cases in the community circulating", Dr. Jose Romero, director of the CDC’s National Centre for Immunisation and Respiratory Diseases, was quoted as saying to CNN. "There are a number of individuals in the community that have been infected with poliovirus. They are shedding the virus," he said. "The spread is always a possibility because the spread is going to be silent."
Polio Caused by Poliovirus
Polio is a very contagious viral disease. About 3 in 4 people infected with polio don’t have symptoms, but they’re still capable of spreading the virus to others, according to the CDC.Only a relatively small number, about 1 in 200 infected people, become paralyzed. A few of those who are paralyzed die because they can’t breathe.
"There isn’t just one case of polio if you see a paralytic case. The incidence of paralytic polio is less than 1 percent," Dr. Patricia Schnabel Ruppert, health commissioner for Rockland County, was quoted as saying to BBC.
"Most cases are asymptomatic or mildly symptomatic, and those symptoms are often missed. So there are hundreds, perhaps even thousands of cases that have occurred in order for us to see a paralytic case."
Advertisement
This follows the discovery of Type 2 vaccine-derived poliovirus in sewage in north and east London.
Advertisement
Source-IANS