Incidence of parvovirus B19 among Hungarian blood donor population during COVID-19 restrictions and the subsequent B19 epidemic of 2024.

The ratio of highly viremic samples to total viremic samples followed a similar trend to that observed in Phase IV, with a relatively high ratio of 65.52% at the start of the epidemic ( Figure 4b ), followed by a decreasing trend except for March, when the incidence of highly viremic samples peaked.

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