More healthy people in the 21st century?
Friedrich
M J
MJ
D005544:Forecasting; D014943:Global Health; D006293:Health Promotion; D006304:Health Status; D006801:Humans; D008136:Longevity; D011315:Preventive Medicine; D011788:Quality of Life; D014481:United States; D014483:United States Dept. of Health and Human Services