Antibody levels in a cohort of pregnant women after the 2009 influenza A(H1N1) pandemic: Waning and association with self-reported severity and duration of illness.
Gro TunheimIda LaakeAnna Hayman RobertsonKristian WaalenOlav HungnesLisbeth M NaessRebecca J CoxSiri MjaalandLill TrogstadPublished in: Influenza and other respiratory viruses (2019)
Antibody waning was similar in vaccinated women and women with ILI. More severe ILI or longer duration of illness was associated with higher HI-titers. Most unvaccinated pregnant women with ILI had low HI-titers, probably due to moderate illness and HI-titer waning between exposure and sampling.