One of the reasons people who have already recovered from COVID-19 have been stuck in nursing homes for so long is because they need 2 negative tests in order to be released (because there are so many false results, they are being extra careful that someone is really over it). So someone will get sick with COVID-19, be over it in a week, but be in the nursing home for 2 months because of the lingering genomes causing the tests to show up as positive. This is the real reason why the nursing home numbers are so high; they simply aren't letting people out once they have recovered.