Както всички ваксини, Prepandemic influenza vaccine (H5N1) (split virion, inactivated, adjuvanted) GlaxoSmithKline Biologicals 3, 75 µg може да не предпази напълно всички хора, които са ваксинирани.
Tāpat kā ar visām pārējām vakcīnām, Prepandemic influenza vaccine (H5N1) (split virion, inactivated, adjuvanted) GlaxoSmithKline Biologicals 3. 75 µg var pilnībā nepasargāt visus vakcinētos.