United Biomedical is now working with San Miguel County, which includes the famous Rocky Mountain ski destination, to test all 8,000 residents for COVID-19 antibodies — making it the first community in the country to do widespread antibody testing. The idea, officials said, is to learn from an individual’s blood whether there is evidence the person has already been exposed. With that information, officials can then make decisions about whether quarantines and restrictions would need to continue and whether they need to be as widespread as they are in states and cities across the country right now.