An enterovirus D68 test for a child patient at Texas Children's Hospital came back negative. According to the city's health department, it was the first test sent out from the Houston area. Over the weekend, we learned about the first death directly linked to the virus — a 4-year-old boy in New Jersey. According to UTMB’s Galveston National Laboratory, respiratory viruses like enterovirus are actually relatively common this time of year. But this year there are more cases that seem more severe. "To see something this unusually severe and causes severe symptoms is a bit unusual and the fact that it's spreading quickly," said Joan Nichols, with the GNL. Typical symptoms include a runny nose and fever, and possibly a cough. Patients with asthma or difficulty breathing are most at risk. "Obviously high fever, problems with breathing, immediately those would be kind of things you would seek care at maybe an emergency room or at least from your family physician," Nichols said. The best advice to prevent your child from getting sick is just common sense advice — wash your hands, don't touch your eyes or nose and stay away from others if you are sick.