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APA Citation
Vo, A. D., Branch-Elliman, W., La, J., Ronan, M., Brophy, M., Wu, J., Do, N., Strymish, J., Fillmore, N., & Monach, P. (n.d.). 788. Risk Factors for Severe COVID-19 Breakthrough Infections: A Retrospective, Nationwide Cohort Study. Open forum infectious diseases, 9, . http://access.bl.uk/ark:/81055/vdc_100174899018.0x000006