Table 1.

Location	Date range when lineages appeared	Days within range	Number of samples	Number of RBD mutations
NY2	8/16/21–02/28/22	170	10	4–18
NY3	1/31/21 [8] −3/14/22	437	7	16–24
NY10	4/4/21–11/29/21	239	22	4–11
NY11	4/19/21–11/22/22	217	20	4–9
NY13	10/26/21–2/14/22	111	5	12–15
NY14	5/10/21–10/18/21	161	9	8–15
MO33	3/15/21–4/27/21	43	12	4–6
MO45	6/8/21–2/22/22	259	3	4–5
CA	11/4/21–12/21/21	47	3	16