[Shortly before the influenza season. Even risk patients are often not protected].
D000367:Age Factors; D000368:Aged; D005858:Germany; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control*; D015201:Meta-Analysis as Topic; D008875:Middle Aged; D012307:Risk Factors; D012621:Seasons; D013997:Time Factors
D007252:Influenza Vaccines