https://www.selleckchem.com/products/th1760.html No patients required transfer to a medical facility. Adolescents in psychiatric inpatient settings may be especially vulnerable to COVID-19 infection. Close collaboration between medical and psychiatric care providers is needed to optimize care for this population and to address admission and disposition options for infected patients. Adolescents in psychiatric inpatient settings may be especially vulnerable to COVID-19 infection. Close collaboration between medical and psychiatric care providers is needed to optimize care for this population and to address admission and disposition options for infected patients. This study aimed to assess whether youth cigarette and electronic cigarette (e-cigarette) use are associated with coronavirus disease 2019 (COVID-19) symptoms, testing, and diagnosis. An online national survey of adolescents and young adults (n= 4,351) aged 13-24 years was conducted in May 2020. Multivariable logistic regression assessed relationships among COVID-19-related symptoms, testing, and diagnosis and cigarettes only, e-cigarettes only and dual use, sociodemographic factors, obesity, and complying with shelter-in-place. COVID-19 diagnosis was five times more likely among ever-users of e-cigarettes only (95% confidence interval [CI] 1.82-13.96), seven times more likely among ever-dual-users (95% CI 1.98-24.55), and 6.8 times more likely among past 30-day dual-users (95% CI 2.40-19.55). Testing was nine times more likely among past 30-day dual-users (95% CI 5.43-15.47) and 2.6 times more likely among past 30-day e-cigarette only users (95% CI 1.33-4.87). Symptoms were 4.7 times more likely among past 30-day dual-users (95% CI 3.07-7.16). COVID-19 is associated with youth use of e-cigarettes only and dual use of e-cigarettes and cigarettes, suggesting the need for screening and education. COVID-19 is associated with youth use of e-cigarettes only and dual use of e-cigarettes and cigarettes, suggesting t