Coronavirus Disease 2019 (COVID-19) Outbreak Associated With Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) P.1 Lineage in a Long-Term Care Home After Implementation of a Vaccination Program—Ontario, Canada, April–May 2021
Chantal Williams, Dana Al-Bargash, Celeste Macalintal, Rebecca Stuart, Anu Seth, Julienne Latham, Leah Gitterman, Stephanie Fedsin, Marion Godoy, Robert Kozak, Jennifer L. Guthrie, Heidi Wood, Allison McGeer, Susy Hota, Elizabeth Rea
Abstract
In a P.1 coronavirus disease 2019 (COVID-19) outbreak in a long-term care home, vaccine effectiveness against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection was 52.5% (95% confidence interval: 26.9%-69.1%) in residents and 66.2% (2.3%-88.3%) in staff. Vaccine effectiveness against severe illness was 78.6% (47.9%-91.2%) in residents. Two of 19 vaccinated resident case patients died. Outbreak management required both vaccination and infection control measures.
Topics & Concepts
MedicineOutbreakCoronavirusVaccinationInfection controlVirologyBetacoronavirusSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2)Coronavirus disease 2019 (COVID-19)Confidence intervalPediatricsDiseaseIntensive care medicineInternal medicineInfectious disease (medical specialty)SARS-CoV-2 and COVID-19 ResearchCOVID-19 and Mental HealthCOVID-19 Clinical Research Studies