The agency has not yet confirmed whether the New Hampshire patient, a juvenile from Rockingham County, contracted AFM or if it is another illness, said Jake Leon, a spokesman for the state Department of Health and Human Services.
So far across the county, 62 cases of the rare polio-like neurological condition have been reported.
What is known about the illness is that more than 90 percent of the confirmed cases are in children 18 years old or younger.
More broadly, she noted, "there is a lot we don't know about AFM".
No one knows how the disease is spreading, Gupta said. There was one confirmed death previous year, the CDC said on Tuesday. The CDC still has not pin-pointed exactly what's causing this disorder, but they suspect a virus that circulates this time of the year.
"This remains a rare syndrome, but the similarities to poliomyelitis, polio-like illness, are concerning and bear close monitoring", Dr. Todd Ellerin, director of infectious diseases at South Shore Hospital in Weymouth, told ABC News in an interview.
Acute flaccid myelitis, or AFM, is a condition that affects the nervous system, particularly the spinal cord.
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Most cases of weakness and paralysis have been in children. However, the illness has been on the rise in the USA since 2014.
Extremely. According to the CDC, there were 38 confirmed cases in 16 states this year through September 30.
In some cases patients recover from the paralysis, but in others it continues.
There is no specific treatment for AFM, according to the CDC, although neurologists might recommend things like physical therapy to help treat muscle weakness on a case-by-case basis. We actually don't know what is causing this increase. Since the CDC started keeping track in August 2014, there have been 386 cases of AFM - mostly in children.
Other enteroviruses have also been found in patients with AFM. The CDC says there are preventative measures people can take to reduce the risk of infections that could to AFM.
The Douglas County Health Department's Phil Rooney said, "This is not a diagnosis like flu or other diseases where you can do blood draw fluids". Most of the cases have involved children.
On the CDC's website, it lists symptoms of the disease, which include facial droop/weakness, difficulty moving the eyes, drooping eyelids, or difficulty with swallowing or slurred speech.
The CDC encourages people to prevent the disease by staying up to date on vaccines, washing hands and protecting against mosquito bites.