A mystery virus that is causing polio-like symptoms in children has spread to southern California.

Lucian Olivera, 2, is the latest child to be confirmed to have the illness.  Lucian was 11 months old when he had an ear infection before suddenly being unable to stand or use his legs.

Stanford University confirmed on Friday it was the mysterious virus.

Now, doctors are trying to determine if the weakness in the child’s legs is permanent.

“Really, it’s unknown the severity of this for each individual. The thought is that it is permanent, but we don’t know all the things that will happen to every patient,” Dr. John Dingilian said.

Olivera is wearing a brace on his legs and his parents are preparing that he may never be able to walk on his own.