Abstract
The COVID-19 pandemic resulted in adolescents' increased exposure to daily experiences of risk factors for depression and anxiety (e.g., loneliness). Intensive longitudinal studies examining daily experiences during the pandemic have revealed short-term and long-term consequences on youth mental health. Although evidence suggests small average increases in adolescent depression and anxiety, most of the story is in variability: increases are higher for youth and families with greater pre-existing mental health vulnerabilities and fewer socioeconomic resources, whereas increases are lower when social or financial support and positive coping and health behaviors are available and employed. Public health and economic policies should be mindful of youth mental health risks and actively promote known mental health supports, including family economic resources, access to mental healthcare, and social connection.