Fig. 1From: Habit formation of preventive behaviours during the COVID-19 pandemic: a longitudinal study of physical distancing and hand washingTimeline of the longitudinal survey in the context of the development of COVID19 pandemic in the Netherlands. The 20 waves of the study were aggregated into five phases that roughly followed critical events of policy changes. The curve in the background indicates the number of daily new cases per 100,000 peopleBack to article page