There are now more than 125 confirmed or suspected cases of acute flaccid myelitis — the “mystery illness” that’s been affecting children across the US and leaving them paralyzed.

Federal health officials released the updated numbers on Tuesday, and said they still had no idea what was causing the spike in AFM cases or why kids were getting it in the first place.

“We understand that people, particularly parents, are concerned,” said Dr. Nancy Messonnier, director for the CDC’s National Center for Immunization and Respiratory Diseases, during a teleconference call with reporters.

“There is a lot we don’t know about AFM, and I am frustrated that despite all of our efforts, we haven’t been able to identify the cause of this mystery illness”

The Centers for Disease Control and Prevention has received reports of at least 62 confirmed cases in 22 states, according to officials.

Another 65 cases are being investigated.

“This is a mystery so far,” Messonnier said, describing AFM as a “pretty dramatic disease,” which preys on a child’s nervous system.

About 90 percent of the cases have involved paralysis, according to the CDC.

“We know that some patients diagnosed with AFM have recovered quickly and some continue to have paralysis and require ongoing care,” Messonnier said, noting how most have a “sudden onset of weakness.”

“They are generally seeking medical care and being evaluated by neurologists, infectious disease doctors and their pediatricians.”

The affected have reportedly ranged in age from 18 to 4-years-old. Officials would not say what states they lived in, but cases have been reported in New York, Minnesota, Illinois, Colorado, and Washington.

Some possible causes being investigated by the CDC include enteroviruses, which affect the digestive system, and rhinoviruses — the infectious agents associated with the common cold.

“Right now, we know that poliovirus is not the cause,” Messonnier said, dispelling reports that AFM was possibly linked to polio.

Physicians first began noticing an increase in AFM patients in 2014, with roughly 120 confirmed cases. Numbers dropped drastically in 2015 and 2017 — to 22 and 33, respectively — but were back up again in 2016 at 149. Officials have been unable to determine why the spikes are coming in waves.

“As a parent myself I understand what it’s like to be scared for your child,” Messonnier said. “Parents need to know that AFM is very rare, even with the increase in cases that we are seeing now. We recommend seeking medical care right away if you or your child develop sudden weakness of the arms and legs.”

With Post wires