Five children in California have a ` ` polio - like disease , '' according to neurologists . The CDC is aware of the small cluster of cases in California but is not actively involved in an investigation , a spokesman told CNN . One of the children tested positive for virus 68 , a rare type of enterovirus . Another type , virus 71 , is more commonly linked to paralysis . Both are uncommon in the United States ; state health officials say risk is very low .
Five children in California have a ` ` polio - like disease , '' according to neurologists . One of the children tested positive for virus 68 , a rare type of enterovirus . Another type , virus 71 , is more commonly linked to paralysis . Both are uncommon in the United States ; state health officials say risk is very low .