What is a recent HIV infection?

The mean duration of recent infection may differ by manufacturers and is about 6 months for Sedia Asante RTRI assay and 4 months for Maxim Swift RTRI assay; however, there is a distribution around the mean, which can vary from ≤3 months to >9 months across individuals due to variation in immune response. Therefore, at the individual level, it is appropriate to interpret recent HIV infection as having been acquired approximately within the past 12 months.