Differentiation between Puumala hantavirus infection and maternal antibodies.

<p>Predicted probability (solid line) with 95% CI (dashed lines) of bank voles captured in fall to carry hantavirus antibodies in relation to body mass. The dotted vertical line indicates the threshold value (14.4 g) above which seropositive animals were treated as genuinely infected. Spheres indicate the numbers of observed data points.