title: Flu jabs given in morning are more effective.
mesh_terms: D000368:Aged; D000914:Antibodies, Viral / Q000096:biosynthesis*; D000917:Antibody Formation / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control*; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D000914:Antibodies, Viral; D007252:Influenza Vaccines