HHS-CDC NEWS: influenza vaccination levels among persons aged > or =65 years and among persons aged 18-64 years with high-risk conditions--US, 2003.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D005006:Ethnicity; D006306:Health Surveys; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000517:prevention & control*; D008875:Middle Aged; D012307:Risk Factors; D012959:Socioeconomic Factors; D014481:United States; D014611:Vaccination / Q000706:statistics & numerical data*
D007252:Influenza Vaccines