"There are now two possible cases reported in 2018 that are under investigation", said the Maryland health department's Brittany Fowler.
Symptoms include a sudden onset of limb weakness, loss of muscle tone and reflexes, facial droop, difficulty moving eyes, drooping eyelids, difficulty swallowing, and slurred speech.
Health officials have also yet to confirm the cause of the illness, despite testing many different specimens from patients for a wide range of pathogens that case AFM.
Illinois Department of Public Health Director Nirav Shah said Friday it's understandable parents would be concerned. NYSDOH reports suspect cases of AFM due to EV-D68 to CDC for further investigation, and no cases have been confirmed in New York State in 2018 thus far.
All told, 16 states have confirmed a total of 38 cases of acute flaccid myelitis in 2018.
All cases are among infants and children under age six who all reportedly had symptoms of a respiratory illness in the week prior to developing symptoms of AFM.
A spokeswoman for Children's Mercy said in an email that they have notified the health department and are working with the CDC to learn more about the illness. "All but one of the Texas cases are children".
South Carolina, for instance, does not require physicians to report cases, although clusters of cases - several occurring at the same time in the same area - would be reported, said Tommy Crosby of the state Department of Health and Environmental Control or DHEC. AFM has been compared to polio because the condition can lead to paralysis. Most of the cases that CDC has learned about have been in children. It can also be caused by poliovirus and non-polio enteroviruses, mosquito-borne viruses (such as West Nile virus or Zika virus) and possibly by non-infectious conditions. Most of the patients are children. Afghanistan and Pakistan are the only two countries where wild poliovirus has been seen this year, because conflict makes it hard to vaccinate all children.