Life expectancy in the United States plunged by nearly two years in 2020, the largest decline since World War II, new °ÄÃÅ¿ª½±½á¹û2023¿ª½±¼Ç¼ research shows. Among some racial minorities, the decline was twice that of whites; and compared to 16 wealthy peer countries, the U.S. decline was 8.5 times worse.