The length of time that an individual is considered a "recent" case in years. This number should match the cut-off used in the reference studies to estimate the "Reference False Recency Rate." By default two years is used in order to match [1]
[1] Li Yu, Oliver Laeyendecker, Sarah K Wendel, Fuxiong Liang, Wei Liu, Xueyan Wang, Lu Wang, Xianwu Pang, and Zhongliao Fang. Low false recent rate of limiting-antigen avidity assay among long-term infected subjects from guangxi, china. AIDS research and human retroviruses, 31(12):1247–1249, 2015.17
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