TABLE 2.

Summary of SARS-CoV-2 alpha variant detection in January to March 2021^a

Sample collection time	RT-qPCR test	N501Y	D614G	ORF1abb	RNase P gene
January 2021	Positive	0	58	132	139
	Total (N)	139	139	139	139
	Alpha variant detection rate (%)	0	41.7	95.0	100.0
February 2021	Positive	7	78	139	139
	Total	139	139	139	139
	Alpha variant detection rate (%)	5.0	56.1	100.0	100.0
March 2021	Positive	10	41	96	96
	Total	96	96	96	96
	Alpha variant detection rate (%)	10.4	42.7	100.0	100.0

^a Three hundred seventy-four clinical samples collected in middle January, late February, and March 2021 in the California Bay area.

^b ORF1ab gene was targeted for wild-type SARS-CoV-2.