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APA Citation
Havers, F. P., Russell, K., Chung, J., Monto, A. S., Martin, E. T., Belongia, E. A., McLean, H. Q., Gaglani, M., Murthy, K., Zimmerman, R. K., Nowalk, M. P., Jackson, M. L., Jackson, L. A., & Flannery, B. L. (n.d.). influenza Vaccine Effectiveness among Elderly and Non-Elderly Adults Aged ≥45 Years in the United States, 2011–2012 to 2015–2016. Open forum infectious diseases, 4, S456. http://access.bl.uk/ark:/81055/vdc_100151526541.0x00002a