Effectiveness of patient recall system on immunization rates for influenza.
D000328:Adult; D000368:Aged; D003201:Computers; D004196:Disease Outbreaks / Q000517:prevention & control; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007114:Immunization; D009980:Influenza A virus; D008297:Male; D008875:Middle Aged; D009976:Orthomyxoviridae Infections / Q000517:prevention & control*; D010342:Patient Acceptance of Health Care; D012306:Risk