Table. SARS-CoV-2 identification on three mink farms, Poland, September 2022–January 2023 (n = 23 isolates).

Farm	Date of sampling	Number of mink on the farm	Real-time RT-PCR		Isolate number	Cq range	Clade	Pango lineage
			Positive/tested	Cq range
14	19 Sep 2022	8,650	2/15	33.4–33.9	NA
16	16 Nov 2022	4,000	6/15	20.7–33.0	EPI_ISL_16811138	24.2	GR/20B	B.1.1.307 (probably new?)
					EPI_ISL_16811146	26.1
					EPI_ISL_16811151	23,4
					EPI_ISL_16811154	20.7
17	18 Jan 2023	1,100	15/15	18.3–29.1	EPI_ISL_16994016	18.3
					EPI_ISL_16994017	19.1
					EPI_ISL_16994018	21.0
					EPI_ISL_16994087	23.9

Cq: quantification cycle; NA: not available; SARS-CoV-2: severe acute respiratory syndrome coronavirus 2.