An Outbreak of COVID-19 among mRNA-Vaccinated Nursing Home Residents

Fabrizio Faggiano; Maicol Andrea Rossi; Tiziana Cena; Fulvia Milano; Antonella Barale; Quenya Ristagno; Virginia Silano

doi:10.3390/vaccines9080859

An Outbreak of COVID-19 among mRNA-Vaccinated Nursing Home Residents

Vaccines (Basel). 2021 Aug 4;9(8):859. doi: 10.3390/vaccines9080859.

Authors

Fabrizio Faggiano^{1

2}, Maicol Andrea Rossi¹, Tiziana Cena², Fulvia Milano³, Antonella Barale², Quenya Ristagno⁴, Virginia Silano⁴

Affiliations

¹ Department of Translational Medicine, University of Piemonte Orientale, 28100 Novara, Italy.
² Epidemiology Unit, ASL Vercelli, 13100 Vercelli, Italy.
³ Lab Unit, ASL Vercelli, 13100 Vercelli, Italy.
⁴ Public Health Unit, ASL Vercelli, 13100 Vercelli, Italy.

Abstract

An outbreak was described among the guests of a Long-Term Care Facility in the North of Italy. Among 23 guests, 20 of whom were fully vaccinated with BNT162b2 vaccine, the outbreak led to a final count of 11 positive guests, 9 of whom were vaccinated, and 4 positive healthcare workers, of whom only 1 was vaccinated. Eight of the positive guests (six vaccinated and two unvaccinated) had symptoms that in five cases (three vaccinated and two unvaccinated) led to death. The risk of infection and the risk of death appeared not to be correlated with the health status neither with the serological titer, but only with age.

Keywords: COVID-19; COVID-19 vaccines; SARS-CoV-2; long-term care; nursing home.

Publication types

Case Reports