The deadly poliovirus has been circulating inNew York Citysince April and may have been circulating elsewhere in the state for up to a year. , suggested by new analyzes of wastewater samples from it.
A US Centers for Disease Control and Prevention (CDC) study sheds more light on polio cases detected in unvaccinated individuals in New York City last month. The virus was known to have been cleared from the United States about 40 years ago.
In June, a young adult resident of a New York suburb developed fever, neck stiffness, gastrointestinal symptoms, He was admitted to the hospital after complaining of weakness in his extremities and was found to have the pathogen.
The virus was then isolated from the individual,and was also detected in wastewater samples from two of his counties in neighboring New York.
CDC experts said the individual did not travel internationally during the period of exposure to the pathogen and may have contracted the virus through domestic transmission.
Researchers believe that the strain to which the person was exposed was associated with a weakened version of the virus used in oralpolio vaccinesknown as vaccine-derived poliovirus type 2. I discovered that there is
The first transmission of this strain may have come from someone outside the country since the United States stopped oral polio vaccination in 2000.
Based on genomic analysis of the virus, the strain behind the New York case was related to vaccine-associated poliovirus recently detected in wastewater from Israel and the United Kingdom
Researchers warn that administration of live attenuated oral polio vaccine in areas with low vaccination coverage could result in such infections.
Such live attenuated vaccines are made from viruses that have been attenuated in the laboratory and are capable of stimulating strong immune responses without causing disease
CDC expertise. The House warns thatpeople remain unvaccinated in the United States if exposed to wild-type or vaccine-derived poliovirus, paralytic polio (severe infection with a virus that causes paralysis). disease).
"Low vaccination coverage in patient counties puts communities at risk for new cases of paralytic polio," researchers said in the study.
Since routine immunization services were interrupted during the Covid-19 pandemic,vaccine uptake and coverage, including against polio,have fallen. } and said that "many communities are at risk of outbreaks." disease that can be prevented by vaccines”.
CDC is urging everyone in the United States to stay up-to-date on recommended poliovirus vaccinations.
