This research is studying a vaccine against Mpox (formerly known as monkeypox) that is FDA approved for adults but not yet approved for children. The goal of the study is to determine if the vaccine protects children just as well as it protects adults. The study is also looking at the safety of the vaccine. This study is open to healthy adolescents, ages 12-17. In addition, adolescents with certain immunodeficiency diseases or other conditions, that are well controlled, are eligible to participate.

The Children's Hospital of Philadelphia is recruiting teen drivers to participate in a study that is testing different types of driver training program for reducing new driver crash risk. This study is open to teens between the ages of 16-17 years old who already have an active Pennsylvania learner permit.

Researchers at CHOP are trying to improve outcomes in the treatment of adolescents with anorexia nervosa. Eligible families will receive Family Based Treatment for anorexia nervosa. Some adolescents with anorexia nervosa will also receive Cognitive Remediation Therapy (a treatment that increases flexible thinking). Both parents are required to participate and any siblings living at home are asked to come to the first four treatment sessions. Families will receive treatment for approximately 6 months and will be asked to complete number of assessments during treatment and at two time points after treatment ends.