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.
The MDH says the case is now being reviewed, and did not provide information regarding where in the state this particular case was diagnosed, or whether or not the child is in the hospital.
AFM is a condition that affects the nervous system and causes muscle weakness, according to the CDC. Other symptoms include facial drooping, difficulty moving the eyes, difficulty swallowing and slurred speech. The illness mainly affects children. CNN found 47 confirmed cases and 49 more that were suspected or being investigated, for a total of 96 cases in 30 states in 2018. The CDC has been monitoring an increase in cases since 2014 and on Tuesday reported that it has confirmed 386 instances of AFM across the country over the last four years, a lot of them involving children.
"This is actually a pretty dramatic disease", she said.
The CDC says it seems to be following an every other year pattern that emerges in the fall.
CNN reached out to several health departments across the country, including IL, which reported 10 cases of AFM.
About 120 confirmed cases were reported in 2014. Officials have been baffled by the increase, and are starting to count suspected cases as well as confirmed ones to better anticipate increases in confirmed cases over the coming months. Messonnier said West Nile virus, which had been listed as a possible cause on CDC's website, is also not causing the illnesses.
The cause of most of the AFM incidents is unknown, according to the CDC, as are the long-term effects.
"It's not something to really panic about its exceedingly rare, but it is something they want physicians and hospitals to be aware of so that if they do see cases, they get reported and hopefully the testing can find out what's causing it", said Mark Rasnake, who is an infectious disease physician.
Parents have reported that the limbs of affected children appear lifeless.
Other than muscle weakness without pain, there is not an obvious indicator that a child has been infected.
"What is alarming and frightening is they suddenly develop weakness, and typically it's in an arm or leg. and it comes out of the blue.and that weakness comes and often times it's persists", Dr. Sanjay Gupta said. But, if their child is diagnosed, parents should prepare for extensive physical therapy - therapy that isn't always covered by insurance, he said.
Once diagnosed, some patients have recovered quickly, but some continue to have paralysis and require ongoing care, Messonnier said.