when was the pcr test invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the pcr test invented	0.31	1	1420	56	30
when	0.11	0.1	3810	11	4
was	1.29	0.5	7966	55	3
the	0.81	0.7	8913	39	3
pcr	1.51	0.8	8756	65	3
test	1.65	0.6	4157	85	4
invented	0.17	0.6	9562	77	8

Keyword	CPC	PCC	Volume	Score
when was the pcr test invented	1.74	0.5	5713	98
who invented the pcr test	0.46	0.6	5636	31
who invented the pcr test for covid	1.91	0.8	3248	77
man who invented pcr test	1.05	0.2	3948	72
when was the pcr technique discovered	1.46	0.8	2717	34
when was pcr invented	0.67	0.3	9965	39
what year was pcr invented	1.33	0.5	1583	38
when was pcr discovered	1.07	0.2	5961	55
who invented the pcr	0.99	0.6	9783	90
pcr technique was invented by	1.05	0.8	2526	88
when was pcr developed	1.21	0.7	7870	44
creator of the pcr test	0.45	0.2	6914	58
history of pcr technique	0.49	0.4	6734	99
pcr discovered in which year	1.65	0.8	3410	31