when did cdc change vaccine definition

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did cdc change vaccine definition	1.84	1	983	95	38
when	0.53	0.5	2413	64	4
did	0.95	0.8	771	8	3
cdc	1.14	0.4	8189	93	3
change	1.14	0.4	5012	49	6
vaccine	0.23	0.9	906	55	7
definition	1.46	0.7	9547	30	10

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Keyword	CPC	PCC	Volume	Score
when did cdc change vaccine definition	1.18	0.1	1668	44
cdc vaccine definition change	0.94	0.9	1782	6
when did the definition of vaccine change	1.07	0.7	8409	3
when was the definition of vaccine changed	0.07	0.5	6148	49
who changed the definition of a vaccine	0.34	0.7	8265	17
did the cdc approve the vaccine	1.04	0.6	7858	58
change in vaccine definition	0.54	0.9	1612	9
when did cdc change its name	1.56	0.5	6210	21
history of vaccines cdc	0.94	0.6	6992	71
when did the vaccination come out	1.33	0.4	1947	34
when did vaccine become available in us	1.3	0.3	1165	78
when did vaccine start	0.32	0.1	4242	41
cdc history of vaccinations	0.83	0.5	3133	75
cdc current dates of vaccine information	1.03	0.9	5467	38
history of cdc vaccine schedules for children	0.34	0.6	9453	41
cdc and the vaccine	1.65	0.3	1379	84
what years was the vaccine introduced	1.23	1	3926	30
cdc update on vaccines	0.22	0.9	562	34
did cdc approve new covid vaccine	1.68	0.7	9015	12
did cdc approve covid vaccines	1.67	0.8	3981	27
when did the cdc approve the covid vaccine	0.76	0.4	4309	61
does the cdc approve vaccines	1.47	0.1	859	74
who approves the vaccine	0.63	0.8	30	89
cdc vs fda vaccine approval	1.73	0.8	3796	94
who approved cdc vaccine schedules	0.42	0.5	2927	16
has the vaccine been approved	0.1	0.4	9181	89
cdc making the vaccine decision	1.34	0.7	6140	99
does the cdc create vaccines	1.78	0.5	6724	98
does the fda approve vaccines	0.2	0.5	4424	84
reviewing vaccine administration history cdc	0.69	0.1	2478	87
cdc announcement on vaccine	0.75	0.9	5287	24
cdc approved vaccines in usa	1.57	0.4	8348	68
does the cdc make vaccines	1.46	0.1	4641	76
cdc latest news on vaccine	0.55	0.1	4013	74

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