The largest published COVID-19 pediatric series to date included only 13 patients considered to be critically ill and only described the Chinese outbreak. There are essentially no data outside of this and nothing to begin to understand the prevalence of severe/critical pediatric COVID-19, the risk factors associated with this illness, outcomes from COVID-19, and factors (patient or treatment) that may be associated with an improved or worsened outcome. This study will identify all children admitted to an inpatient unit with a diagnosis of COVID-19. Clinical data will be collected through medical record review to describe in detail the demographics and clinical characteristics, including clinical course and treatment, of infected children who require hospitalization.

The study will test a computerized treatment with subjects ages 13-17 years who are interested in seeking treatment for alcohol and/or cannabis use. Follow-up assessments will be conducted at one- and three-months following treatment.

This study tests a mobile app that aims to reduce alcohol use and risky sexual behavior.

Interested individuals will complete an online screener to see if they are eligible. Eligible participants will complete six mobile sessions over the course of about 45 days.

The first and the last session will be completed via video conference with a member of the research staff. The second through fifth sessions are completed independently on the mobile app. Sessions involve survey questionnaires, clinical interviews, and computerized tasks. Participants will be compensated for completed study sessions.