Fargo, N.D. (AP) Public health officials say a rare virus believed to be the cause of a severe respiratory illness that has affected children in at least 10 states may have already made its way to North Dakota and South Dakota. The suspected germ is Enterovirus 68. It's an uncommon strain of a common family of viruses that typically hit from summertime through autumn. The virus can cause mild cold-like symptoms including runny noses, coughing and wheezing. Health officials say this strain is particularly harsh and children with asthma and other health problems are particularly at risk. Officials in the Dakotas are waiting for test results from the Federal Centers for Disease Control and Prevention. There is no vaccine for the virus. Most children recover within a week with no lasting problems.