Summary of timing of superinfection events relative to initial infection events.

<p>Subject identifiers for the 21 cases of superinfection are listed with the 9 cases identified here listed first, followed by the 12 cases from prior studies <a href="http://www.plospathogens.org/article/info:doi/10.1371/journal.ppat.1003593#ppat.1003593-Chohan2" target="_blank">[5]</a>, <a href="http://www.plospathogens.org/article/info:doi/10.1371/journal.ppat.1003593#ppat.1003593-Piantadosi1" target="_blank">[12]</a>, <a href="http://www.plospathogens.org/article/info:doi/10.1371/journal.ppat.1003593#ppat.1003593-Piantadosi2" target="_blank">[17]</a>. Time since initial infection (years) is represented as blue bars. The red rectangles represent the interval between the last timepoint at which only the initial variant was detected and the first timepoint at which the superinfecting variant was detected. The blue line marks the interval midpoint. *QB045 was HIV RNA-positive at enrollment and was therefore excluded from the incidence analysis.