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. Author manuscript; available in PMC: 2018 Jun 22.
Published in final edited form as: Vaccine. 2017 May 27;35(29):3621–3638. doi: 10.1016/j.vaccine.2017.05.052

Table 1. Summary of sampled documents.

The table summarizes article characteristics by vaccine sentiment group and describes document type, article source, target vaccine population, vaccine type focus, and specific vaccine topics.

Vaccine sentiment
articles
(Total n = 50)
Positive (n = 23) Negative (n = 21) Neutral (n = 6)

Document type Blog = 8 (34.8%) Blog = 15 (71.4%) News = 4 (66.7%)
News = 7 (30.4%) Alternative News = 2 (9.5%) Blog = 1 (16.7%)
Magazine = 5 (21.7%) Magazine = 2 (9.5%) Magazine = 1 (16.7%)
Informational = 3 (13.0%) Commercial = 1 (4.8%)
News = 1 (4.8%)

Article source type Media = 9 (39.1%) Media = 15 (71.4%) Government = 2 (33.3%)
Government = 8 (34.8%) Industry = 3 (14.3%) Media = 2 (33.3%)
News = 4 (17.4%) Personal = 2 (9.5%) News = 2 (33.3%)
Industry = 1 (4.4%) Forum = 1 (4.8%)
Resource = 1 (4.4%)

Target vaccine population Childhood = 16 (69.6%) Childhood = 15 (71.4%) Childhood = 3 (50.0%)
Adolescent = 3 (13.0%) Adolescent = 0 Adolescent = 2 (33.3%)
Adult = 1 (4.4%) Adult = 0 Adult = 1 (16.7%)
Multiple = 3 (13.0%) Multiple = 6 (28.6%) Multiple = 0

Vaccine type focus General = 8 (34.8%) General = 14 (66.7%) General = 3 (50%)
Specific = 15 (65.2%) Specific = 7 (33.3%) Specific = 3 (50%)

Specific vaccines Measles/MMR = 9 Shingles = 1 Whooping cough = 2
HPV = 3 Polio = 1 Influenza = 1
Influenza = 1 Gardasil = 1
Meningococcal = 1 Measles = 1
Rubella = 1 Swine flu = 1
Tdap = 1
Hepatitis B = 1