At the start of the SARS-CoV-2 pandemic, several workers had symptoms compatible with COVID-19 at a time when PCR (smear) testing was only allowed for hospitalized people. In addition, the PCR test has a fairly low sensitivity. In this context, serology can make it possible to determine whether the symptoms are indeed linked to exposure to SARS-CoV-2.
As a hospital, and in order to prepare for a possible second epidemic wave, it is also useful to know the proportion of staff members who have already been in contact with the virus for organizational purposes and symptom assessment.
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