By Kate Conger and Erin Griffith, The New York Times For more than a week, Linda Quinn, 81, has isolated herself inside her Bellevue, Washington, home to keep away from the coronavirus. Her only companion has been her goldendoodle, Lucy. To blunt the solitude, Quinn’s daughter, son-in-law and two grandsons wanted to hold video chats with her through Zoom, a videoconferencing app.