TABLE 5.

Comparative Efficacies* of TIV and Bivalent CAIV

Baylor Family Study (Clover,67 Piedra106)
SubtypeYear 2Year 3Year 4*
CAIV % (95% CI)TIV % (95% CI)CAIV % (95% CI)TIV % (95% CI)CAIV % (95% CI)TIV % (95% CI)
A(H1N1)81 (1–97)56 (−17–84)100 (18–100)78 (35–97)
A(H3N2)89 (35–98)67 (−6–90)
Vanderbilt Study (Edwards,105 Neuzil46)
StrainZCAIVTIV
A(H1N1)96 (67–99)91 (64–98)
A(H3N2)68 (1–90)77 (20–94)
  • * No immunization given in year 4.