Dec. 16 was a day of relief and nervousness at Temple University Hospital in Philadelphia. Health-care workers lined up and some even teared up when they received a vaccine against the novel coronavirus, the disease they have been fighting for months on end. Read more: https://wapo.st/2IYwVWq. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/