Background: Data about seroprevalence of COVID-19 infections in US Health Care Workers (HCW) is limited. CDC reported that about 55% of SARS-CoV-2 PCR positive HCWs reported exposure at work, with most of them being minimally symptomatic or asymptomatic(1). This study characterizes the symptomatic/asymptomatic SARS-CoV-2 seropositive frontline HCW in our hospital and correlate clinical features with [...]