Hemagglutination inhibition and alternate serologic responses following Influenza A(H3N2) virus infection - R notebook

This project analyses antibody response patterns following PCR-confirmed H3N2
influenza infection in a household cohort. Participants are classified into
response groups based on haemagglutination inhibition (HAI) and alternate
antibody assays (full-length HA, HA stalk, neuraminidase). The analysis
examines how pre-exposure antibody titers predict response group membership
using multinomial and logistic regression, with sensitivity analyses across
H3N2 strains and age strata.