Healthy Clinical Trials in Knoxville, TN

The purpose of this study is to assess the safety and immunogenicity of a single intramuscular (IM) injection of different doses of an respiratory syncytial virus (RSV) and human metapneumovirus (hMPV) vaccine candidate, in adult participants aged 60 years and older. In addition, the study will evaluate the safety and immunogenicity of a booster vaccination administered 12 months after the primary vaccination in a subset of the study population. Read Less

The goal of this clinical trial is to test the usability, acceptability, and preliminary efficacy of a digital dietary self-monitoring (dDSM) log that uses positive reinforcement strategies (caregiver praise and gamification) to improve child engagement in DSM. The main aims are to: Examine the usability of a dDSM log that uses positive reinforcement (praise and gamification) among children 8-12 years and their adult caregivers. Examine the acceptability of a dDSM log that uses positive reinforcement (praise and gamification) among children 8-12 years and their adult caregivers Conduct a proof-of-concept trial that examines the effects of positive reinforcement on child DSM behaviors. Explore differences in children's intrinsic motivation. Participating children will be instructed to self-monitor their daily intake of targeted food groups (fruits, vegetables, sweet and salty snack foods, and sugar-sweetened beverages) for 4 weeks using a personal web-based DSM log. Each child-caregiver dyad will be randomly assigned to 1 of 4 conditions: BASIC, PRAISE, GAME, or PRAISE+GAME. For PRAISE and PRAISE+GAME conditions, caregivers will be instructed to provide daily process praise to their child related to DSM behaviors. For GAME and PRAISE+GAME conditions, logs will integrate three game mechanics: points, levels, and a virtual pet. Points will be accumulated for engaging in DSM behaviors, and accrual of points will evolve a virtual pet over time. Read Less