The U.S. Centers for Disease Control and Prevention said there are no hantavirus cases in the country as of Thursday, as it monitors 41 people across the U.S. for the virus. The agency said the risk to the general public remains low in the aftermath of an outbreak on a cruise ship. The CDC advised those who are being monitored to stay at home and avoid people for 42 days. That includes people from three main groups: passengers who were recently repatriated and are now in Nebraska and Atlanta,