Table 1.
Diagnostic criteria proposal for acute HBoV infection.
| Nasopharyngeal swab | HBoV high DNA load on secretion |
| OR | |
| HBoV mRNA on secretion | |
| AND one of the following | |
| Blood | Serum positive IgM |
| Low IgG avidity | |
| >4-fold IgG titre | |
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