vaccines definition us history

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
vaccines definition us history	1.3	0.3	7941	44	30
vaccines	0.49	0.4	7842	71	8
definition	0.53	0.3	5184	95	10
us	0.04	0.4	9264	41	2
history	1.74	0.1	921	38	7

Keyword	CPC	PCC	Volume	Score
vaccine definition history	0.1	0.8	2481	60
vaccines definition us history	1.09	0.2	6413	95
history of vaccines - wikipedia	0.21	0.4	8513	63
what is the history of vaccines	1.57	0.5	1112	27
a brief history of vaccines and vaccination	1.34	0.1	3325	96
history of vaccines in the united states	1.92	0.1	8860	96
original definition of vaccine	1.46	0.8	5124	61
vaccines in american history	1.73	0.3	8515	73
history of vaccination in the us	0.71	1	9357	50
the term vaccine was introduced by	0.25	0.5	6489	84
where did the term vaccine come from	1.07	0.1	1341	15
polio vaccine definition us history	0.45	0.1	4412	99