A video abstract on the article introducing the Citizenship, Migration and Mobility in a Pandemic (CMMP) dataset. Initiated and led by Lorenzo Piccoli this is a project that systematically collected restrictions to human movement as well as the exemptions in place during the peak of the Covid-19 pandemic in most places.
Piccoli, Lorenzo, Jelena Dzankic, and Didier Ruedin. 2021. ‘Citizenship, Migration and Mobility in a Pandemic (CMMP): A Global Dataset of COVID-19 Restrictions on Human Movement’. PLOS ONE. 16(3): e0248066. 
DOI: 10.1371/journal.pone.0248066
Didier Ruedin 