The Centers for Disease Control and Prevention said they haven't found the cause.

CDC is not releasing a list of the 22 states with confirmed and suspected cases because of privacy issues. It can start with a fever and respiratory illness; then the sick child suddenly loses the ability to move an arm or leg.

A toddler has been hospitalized at Wolfson Children's Hospital with acute flaccid myelitis, a polio-like illness affecting children nationwide, a representative for the Jacksonville hospital confirmed Tuesday to News4Jax.

AFM affects a person's nervous system, according to the CDC website, mainly in the spinal cord, and can present polio-like symptoms, including weakness and pain in the arms and legs.

Katy Payne, a mother from IL, who was interviewed, said about her daughter: "I took her to the ER because she turned blue".

It's a rare disease that can cause muscle weakness, partial paralysis, and general polio-like symptoms in children. There was one confirmed death a year ago, the CDC said on Tuesday. The CDC is now investigating a potential case of AFM in New Hampshire, an official said Wednesday. Most of the cases have involved children.

"Poliovirus is not the cause of these AFM cases". We actually don't know what is causing this increase.

Doctors diagnosed Aamira with AFM.

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"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.

There is no specific treatment, and most of the victims recover. Regaining the ability to walk after AFM infection may take a lot of physical therapy, Benjamin Greenberg, a neurologist who has treated children with AFM at the University of Texas Southwestern Medical Center, tells The Washington Post. Muscles and reflexes are weakened and some patients are left paralyzed.

Other possible cases are still under investigation. Fifteen states said they'd confirmed cases this year.

Of the cases announced Tuesday, 62 have been confirmed in 22 states, according to Nancy Messonnier, a top official at the CDC. "There's going to be a delay, a lag in the timing of some of these reports".

She added that confirmation of each case requires a review of MRI images and symptoms, "so there is going to be a bit of a lag as we confirm those things".

States are reporting their cases to the CDC, Messonnier said.

No known cases have been reported in Virginia or the District this year, but there were three confirmed cases in Virginia in 2016, health department officials said.