Nursing homes are still taking days to get back Covid-19 test results as many shun the Trump administration's central strategy to limit the spread of the virus among old and sick Americans. In late summer, federal officials began distributing to nursing homes millions of point-of-care antigen tests, which can be given on-site and report the presence or absence of the virus within minutes. … But as of Oct. 25, 38% of the nation's roughly 15,000 nursing homes have yet to use a point-of-care test, a KHN analysis of nursing home records shows.