1.
Euro Surveill
; 17(19)2012 May 10.
Article
in English
| MEDLINE
| ID: mdl-22607964
ABSTRACT
Antibody cross-reactivity to the influenza A(H3N2) variant virus recently reported in the United States, was investigated in Norwegian sera. Seroprevalence was 40% overall, and 71% in people born between 1977 and 1993. The most susceptible age groups were children and people aged around 50 years. The high immunity in young adults is likely to be due to strong priming infection with similar viruses in the 1990s. More research is needed to explain the poor immunity in 4554 year-olds.