By BY LUCY TOMPKINS, MITCH SMITH, JULIE BOSMAN AND BRYAN PIETSCH U.S. https://ift.tt/3umFjSg In a single year, Covid-19 became a leading cause of death in the United States, rivaling heart disease and cancer, and has driven life expectancy down sharply. New York Times internal-essential, Coronavirus (2019-nCoV), Deaths (Fatalities), Disease Rates, Vaccination and Immunization February 23, 2021 at 12:08AM