Covid-19; The timeline of a killer

Can this be over already…. Coronavirus disease 2019 (COVID-19) dominated 2020. This is a look back at how the pandemic evolved and progressed through the year, which closed with the arrival of vaccines, but also continued challenges. Updated January 1, 2021   As the year ended, the United States surpassed 20 million infections from SARS-CoV-2,…