Photo-epidemiology to estimate face covering use in select areas in Asia versus the Americas and Africa during the COVID-19 pandemic.

Using photo-epidemiology, we found extreme variation in COVID-19-related face covering use in Phnom Penh, Cambodia (97%); Lima, Peru (86%); Kerala, India (41%); Cuernavaca, Mexico (25%); Atlanta, USA (21%) and Kinshasa, DRC (4%) probably attributable to differences in population experience with face coverings and variations in timing and implementation of relevant advisories.

All Hands on Deck: A synchronized whole-of-world approach for COVID-19 mitigation.

The COVID-19 pandemic can no longer be mitigated by a nationwide approach of individual nations alone. Given its scale and accelerating expansion, COVID-19 requires a coordinated and simultaneous Whole- of-World approach that galvanizes clear global leadership and solidarity from all governments of the world. Considering an 'all hands-on deck' concept, we present a comprehensive list of tools and entities responsible for enabling them, as well a conceptual framework to achieve the maximum impact.