Prevalence, Persistence, and Factors Associated with SARS-CoV-2 IgG Seropositivity in a Large Cohort of Healthcare Workers in a Tertiary Care University Hospital in Northern Italy.

In the study by Weinberger and colleagues on HCW in the first pandemic wave in a quaternary care hospital in Germany [ 52 ], unprotected private contact showed a trend to be associated with a higher rate of seroconversion (OR 3.38; 95%CI, 0.76–28.2, p = 0.08); similarly, unprotected risk contacts in the hospital either to an infected patient (OR 3.45; p = 0.03) or colleagues (OR 3.38; p = 0.04) had a statistically significant association with seroconversion.

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