As 2020 Comes to an End, Here's What We Still Don't Know About COVID-19
More than 68 million infected with the novel coronavirus and more than 1.5 million dead. 2020 has been a year defined by global sickness and loss. In the face of this extraordinary threat, it’s easy to forget how much we have accomplished. Doctors, nurses and staff in hospitals around the world have learned how to better care for those sick with COVID-19. Researchers have uncovered secrets of a virus that, not so long ago, was wholly unknown.