Fig. 2From: Response to influenza vaccination in immunocompromised children with rheumatic disease: a prospective cohort studyResponse to vaccination using haemagglutination inhibition assay and microneutralisation assay . Abbreviations: HI: haemagglutination inhibition; MN: microneutralisation. A selection of samples was both tested for the presence of antibodies using the HI assay and for functional antibodies by MN. From the pre-vaccine sample to the post-vaccine sample the antibody titre was shown to increase, decrease or remain at a plateauBack to article page