Two days before our family Christmas gathering, my sister called me to ask how to find a COVID-19 rapid test site. My niece was coughing and she wanted to make sure it was not the coronavirus before we got together. By the time she called, my sister had already come out empty-handed from visits to two local pharmacies where at-home test kits were sold out. She also checked Amazon, but there was no next-day delivery or pickup for test kits. They would not arrive until the new year. She tried t...