Examining the effects of prior Acceptance and Commitment Therapy (ACT) treatment among anxious cancer survivors during the COVID-19 pandemic: Evidence from a randomized controlled trial.

Treatment with ACT several years earlier did not provide protective benefit to anxious cancer survivors during the pandemic, relative to MEUC. ACT interventions may need to be targeted to pandemic-specific stressors, or booster sessions may be required for prior ACT treatment completers when faced with novel stressors.