Volume 18, Number 2—February 2012
Association of Human Bocavirus 1 Infection with Respiratory Disease in Childhood Follow-up Study, Finland
|Result*||No. (%)||Age, y
|Secondary response†||38 (35)||4.79||4.77||0.73–9.79|
*Maternal antibodies, i.e., low-level (vanishing) IgG, were detected in 35/88 children from whom serum was taken ≤6 mo. of age. Seven children were IgG positive from birth, and their maternal antibodies were not seen to disappear before induction of their own immunity. For 73, the IgG level remained high; for 26, the IgG level decreased with time; and 10 underwent IgG reversion.
†>4-fold increase in, or reconversion of, high avidity IgG (2 children had 2 and 2 other children had 3 secondary immune responses).
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