From US News and World Report…
In one patient, viral suppression lasted nearly three and a half years, with occasional rebounds in virus counts. The other patient had nearly complete HIV suppression for close to four years, but then had a big surge when he was infected with a different HIV strain, a situation called “superinfection.”
In the first patient, researchers found high levels of HIV-specific immune cells called CD8+ T cells that can kill virus-infected cells.
The second patient had a weaker CD8+ T cell response against HIV, but a very strong neutralizing antibody response until the sudden viral rebound.