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Liposomal Influenza Vaccine

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Abstract

▴ This trivalent liposomal influenza vaccine consists of purified influenza haemagglutinin inserted into a membrane of phosphatidylcholine and phosphatidylethanolamine. It contains 15μg of haemagglutinin per viral strain per dose.

▴ The vaccine is immunogenic in the elderly, in younger adults and in children and adolescents with or without cystic fibrosis.

▴ Seroconversion rates were significantly higher with the liposomal vaccine than with a subunit vaccine for 3 of 3 and 2 of 3 strains in 2 published studies. Seroconversion occurred in a significantly greater number of participants receiving the liposomal vaccine than in those receiving a whole virus vaccine for all 3 strains in 1 study.

▴ Seroprotection rates were significantly better with the liposomal vaccine than with a subunit vaccine for 2 of 3 and 1 of 3 strains in 2 trials, and greater than with a whole virus vaccine for 2 of 3 strains in 1 trial.

▴ In a study in children with cystic fibrosis, a single dose of the liposomal vaccine was reported to have greater immunogenicity than 2 half doses (statistical analysis not performed).

▴ Local adverse reactions such as pain at the injection site, local induration, redness and swelling are transient and usually mild.

▴ Liposomal influenza vaccine did not induce a mean antiphospholipid antibody response in elderly volunteers.

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Correspondence to Kristin J. Holm.

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Holm, K.J., Goa, K.L. Liposomal Influenza Vaccine. BioDrugs 11, 137–144 (1999). https://doi.org/10.2165/00063030-199911020-00007

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