A serious respiratory illness that's affected hundreds of children across the country has surfaced in Blount County. According to the Associated Press, school officials have confirmed that two Oneonta Elementary School students have been diagnosed with Enterovirus D68. Officials say that the students are related to each other and are receiving treatment from a local doctor.According to the Centers for Disease Control and Prevention, Enterovirus likely spreads when an infected person coughs, sneezes or touches a surface that others come into contact with. Mild symptoms can include fever, runny nose and sneezing. Severe symptoms can include wheezing and difficulty breathing.