Our stringency index and data from the COVID-19 Government Response Tracker are used in the article.

As Harvard Business School celebrates 100 years of the case study teaching method, the article mentions the Blavatnik School's work of applying the case method to public administration.

The article argues that politicisation fuels the debate over mandatory vaccination. Thomas Hale says that vaccination requirements are here to stay and can increase the number of vaccinated people (in Portuguese).

Thomas Hale comments on vaccination supply and health systems in sub-Saharan Africa.

Article uses data from our COVID-19 Government Response Tracker in a graphic showing international travel policy restrictions in a selection of Asian countries.

Article (in Portuguese) uses our Stringency Index data and says that despite high number of infections, Portugal is one of the countries with the least severe measures in the EU.

Governments now have more choices when responding to COVID-19 due to higher immunity in their populations, says Thomas Hale.