(CNN)There are 10 more confirmed cases of acute flaccid myelitis, a polio-like illness that mostly affects children, the US Centers for Disease Control and Prevention said Tuesday, bringing the total number of confirmed cases to 90 in 27 states this year.

There are also 162 possible cases under investigation, 23 more than last week.
AFM is a rare illness that affects the nervous system, especially the gray matter in the spinal cord, and can cause muscle weakness and sudden onset of paralysis. Last month, the CDC said that more than 90% of the 414 patients since 2014 have been children under the age of 4, although adults can also develop AFM.

Read more: https://edition.cnn.com/2018/11/13/health/afm-cdc-update/index.html