Bulletin of the World Health Organization
Volume 99, Number 6, June 2021, 405-476
https://www.who.int/bulletin/volumes/99/6/en/

COVID-19 social distancing measures and informal urban settlements
— Joyce Wamoyi, Meghna Ranganathan & Heidi Stöckl
http://dx.doi.org/10.2471/BLT.20.265942