A previous study showed that patients with HFRS caused by Dobrava virus seemed to have a higher PCT level [0.74 μg/L (range 0.09–2.83 μg/L)] than those with NE caused by Puumala virus [0.50 μg/L (range 0.10–11.71 μg/L)] (Kim et al., 2011). Here, CALCA is linked to hemorrhagic fever with renal syndrome.