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. Author manuscript; available in PMC: 2020 Feb 6.
Published in final edited form as: Vaccine. 2018 Mar 22;36(17):2254–2261. doi: 10.1016/j.vaccine.2018.02.049

Fig. 3.

Fig. 3

Shows the trend over time and the annual number of systematic reviews for disease/pathogen areas for which ≥ 50 systematic reviews were identified.