Dale AP, Almendares O, Howard B, Burnett E, et al. Investigation of A SARS-CoV-2 Delta (B.1.617.2) Variant Outbreak Among Residents
of a Skilled Nursing Facility and Vaccine Effectiveness Analysis - Maricopa
County, Arizona, June-July 2021. Clin Infect Dis 2022 Apr 12. pii: 6567536. doi: 10.1093.
PMID: 35413107