This is a prospective observational cohort study that will create a patient registry by collecting data on patients who receive REBYOTA to prevent recurrence of Clostridioides difficile infection (CDI). The registry will include data about CDI episodes, CDI related symptoms, healthcare resource utilization (i.e., hospitalizations and re-admissions) and this data will be collected up to 6-months after receiving REBYOTA™.

HIV infected cocaine users have uncontrolled viral levels and impaired immunity to control infection compared to HIV infected non-drug users. We ask the questions why cocaine use makes HIV infected cocaine users more sick than other patients. The goal is to improve immunity to control HIV infection in cocaine users. Both uninfected cocaine users and HIV-infected cocaine users are especially needed in this study.

This is a cross-sectional survey in persons with HIV infection to evaluate experiences of historical oral therapy use and how their perceptions on treatment may have changed with the availability of injectable long-acting therapy. In
addition to surveys, a corresponding retrospective medical chart review will be conducted for each participant.

This is an observational study that create a patient registry by collecting data, biosamples (blood and stool samples) on patients who have been diagnosed with Clostridiodes difficile (C difficile). The registry will include data about CDI episodes, CDI related symptoms, participant experience. The study will last 42 days and there will be 2-3 visits.