In patients who are receiving prolonged antiretroviral treatment (ART), HIV can persist within a small pool of long-lived resting memory CD4+ T cells infected with integrated latent virus. This latent reservoir involves distinct memory subsets. Here we provide results that suggest a progressive reduction of the size of the blood latent reservoir around a core of less-differentiated memory subsets (central memory and stem cell-like memory (TSCM) CD4+ T cells). This process appears to be driven by the differences in initial sizes and decay rates between latently infected memory subsets. Our results also suggest an extreme stability of the TSCM sub-reservoir, the size of which is directly related to cumulative plasma virus exposure before the onset of ART, stressing the importance of early initiation of effective ART. The presence of these intrinsic dynamics within the latent reservoir may have implications for the design of optimal HIV therapeutic purging strategies.

Prolonged Covid‐19 is an emerging issue for patients with lymphoma or immune deficiency. We aimed to examine prolonged length of in‐hospital stay (LOS) due to Covid‐19 among patients with lymphoma and assess its determinants and outcomes. Adult patients with lymphoma admitted for Covid‐19 to 16 French hospitals in March and April, 2020 were included. Length of in‐hospital stay was analyzed as a competitor vs death. The study included 111 patients. The median age was 65 years (range, 19–92). Ninety‐four patients (85%) had B‐cell non‐Hodgkin lymphoma. Within the 12 months prior to hospitalization for Covid‐19, 79 patients (71%) were treated for their lymphoma. Among them, 63 (57%) received an anti‐CD20 therapy. Fourteen patients (12%) had relapsed/refractory disease. The median LOS was 14 days (range, 1–235). After a median follow‐up of 191 days (3–260), the 6‐month overall survival was 69%. In multivariable analyses, recent administration of anti‐CD20 therapy was associated with prolonged LOS (subdistribution hazard ratio 2.26, 95% confidence interval 1.42–3.6, p < 0.001) and higher risk of death (hazard ratio 2.17, 95% confidence interval 1.04–4.52, p = 0.039). An age ≥ 70 years and relapsed/refractory lymphoma were also associated with prolonged LOS and decreased overall survival. In conclusion, an age ≥ 70 years, a relapsed/refractory lymphoma and recent administration of anti‐CD20 therapy are risk factors for prolonged LOS and death for lymphoma patients hospitalized for Covid‐19. These findings may contribute to guide the management of lymphoma during the pandemic, support evaluating specific therapeutic approaches, and raise questions on the efficacy and timing of vaccination of this particular population.