It's possible that some milder cases haven't been reported by doctors to their state health department or the CDC, but Messonnier believes that number would be small.
Federal health officials are anxious about an increase in a mysterious and rare condition that mostly affects children and can paralyze arms and legs, with 127 confirmed or suspected cases reported as of Tuesday.
The CDC says the illness could be caused by viruses, environmental toxins, genetic disorders, or a condition in which the immune system attacks body tissues.
Despite that alarm, there are a lot of unknowns about the polio-like illness, including what causes it and why it affects children more than adults. The Centers for Disease Control and Prevention says symptoms include arm/leg weakness, facial drooping, difficulty moving the eyes and trouble swallowing.
Of the 127 cases, about 90 percent are people under the age of 18, Reuters reported. But the link between AFM and EV-D68 is unclear because not everyone who has AFM tests positive for the enterovirus. Of these cases, 62 have been confirmed in 22 states.More news: Deaths of parents in Wis. ruled a homicide, missing teen in 'danger'
AFM outbreaks appear to follow a pattern, according to the CDC report, with a spike in cases coming every two years in the late summer and early fall. She noted the confirmed cases are in 22 states.
While the virus has similarities with polio, Messonnier stressed that polio was not the cause of the disease.
The CDC received information on 33 confirmed cases of AFM across 16 states in 2017, 149 cases in 39 states. Since then, there have been more than 350 confirmed cases of the sickness.
The Ohio Department of Health says it can not release information about suspected cases, or where the disease was reported.
The CDC says this is still a rare condition that affects less than one in 1 million people per year. Health officials are alarmed and frustrated, because a specific cause hasn't been identified. There was one confirmed death past year, the CDC said on Tuesday.More news: Indian minister resigns to fight sexual harassment accusations
So far, the CDC has found no relationship between vaccines and children diagnosed with AFM from the 2014 cases.
"As a parent myself I understand what it's like to be scared for your child", Messonnier said.
Follow-up with patients from the 2014 and 2016 waves has shown that most children do not recover from acute flaccid myelitis, for which there now is no cure.
"Getting vaccinated, taking precaution against mosquitoes, washing hands-all of these things are recommended by the CDC", said CBS News medical contributor Dr. Tara Narula.
The CDC urges parents to be aware of this illness and to seek medical care right away if family members develop sudden weakness or loss of muscle tone in the arms or legs.More news: Major League Baseball reviewed report of Astros possibly cheating