Keyword Analysis & Research: polio vaccine what year

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
polio vaccine what year	1.2	0.4	3646	42	23
polio	0.97	0.2	4788	31	5
vaccine	1.7	0.4	8295	77	7
what	0.95	0.8	198	27	4
year	0.33	0.3	7474	43	4

Keyword	CPC	PCC	Volume	Score
polio vaccine what year	1.41	0.3	9984	37
what year did the polio vaccine come out	1.44	0.6	4501	45
what year was the polio vaccine invented	0.34	0.1	4067	82
what year was polio vaccine made	0.73	0.1	2481	21
what year was polio vaccine discovered	0.12	0.1	3491	24
polio vaccine year developed	1.93	0.7	7769	13
polio vaccine invented in which year	1.33	0.9	6539	10
polio vaccine year	1.34	0.3	5286	33