Figure 1From: Modeling international mobility using roaming cell phone traces during COVID-19 pandemicAn example of international mobility flows going from EU countries to UK (left) and from UK to EU (right). The plots refer to the 5th of March, a business day before the introduction of mobility restrictions and other non-pharmaceutical interventions in European countries. As lighter is the red as lower is the flow. On this specific day, commuters from Poland are the ones more actively traveling to UKBack to article page