UNASSIGNED: The objective of this study was to calculate Vaccine Effectiveness (VE) in healthcare workers (HCW) and to compare VE between @entity1 and HCW. A case-control investigation based on the prospective study was conducted between 2004 and 2009 in a teaching hospital. All HCW with @entity683 ( @entity683 ) from participating units (n=24) were included, and vaccination status was characterized by interview. A total of 150 HCW presented @entity683 ; 130 (87%) were female, 27 (18%) were positive for @entity683 , and 42 (28%) were vaccinated. Adjusted VE was 89% (95% CI 39 to 98). Among @entity1 , adjusted VE was 42% (95% CI -39 to 76). The difference of VE (VEhcw - VEpat) was 46.15% (95% CI 2.41 to 144). The VE ratio (VEhcw / VEpat) was 2.09 (95% CI -1.60 to 134.17). Influenza VE differed between HCW and @entity1 when the flu season was taken into account. This finding confirms the major impact of host determinants on @entity683 VE.

Influenza vaccine effectiveness among healthcare workers in comparison to hospitalized XXXX : a 2004-2009 case-test, negative-control, prospective study.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity683 :: ('MESH:D007251', 'Disease') :: ['influenza-like illness', 'influenza', 'ILI']
@entity1 :: (9606,Species) :: ['patients']
