Social movements have often played an important role in emergencies, mobilising in defence of those rights that they perceive as being at risk or more urgently needed than ever. In general, progressive social movements develop in moments of intense change, mobilising with the aim of turning them to their advantage. the variable mix of challenges and opportunities related to a critical juncture. The specific balance of challenges and opportunities faced by progressive social movements during the Covid-19 crisis is a central question addressed in this volume. Based on existing research on the first phases of the pandemic Covid-19, this Element addresses the ways in with the health emergency had an impact on the repertoire of action, the organizational networks and the collective framing of progressive social movements that adapted to the pandemic conditions and the related crises, but also tried to transform them.