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Process and storage stability of WIV incorporated in air- (A and C) and vacuum-dried (B and D) ODFs up to 4 weeks at 60 °C/0% RH (A and B) or 30 °C/56% RH (C and D). Hemagglutination titers are represented as log2 titers with significance indicated as * p < 0.05 and ** p < 0.01.
