Antistofdannelse målt med MN 21 dage efter boostervaccinationen var generelt lidt højere for A/ Indonesien/ 05/ 2005 - end for A/ Vietnam/ 1203/ 2004- stammevaccinen.
Antibody responses as measured by MN 21 days after the booster vaccination were generally slightly higher with the A/ Indonesia/ 05/ 2005 than with the A/ Vietnam/ 1203/ 2004 strain vaccine.