Scientists believe a new polio-like virus is responsible for dozens of unexplained cases of paralysis in children over the last year.  The disease, called enterovirus C105, is part of the polio family of viruses and has only recently been discovered, they said. The study's co-author Professor Ronald Turner, of the University of Virginia School of Medicine, said the findings mean people should be aware that 'there's another virus out there that has this association' with paralysis.