Frequently Asked Questions

Even if you don't have technical experience, you can help by:

If you want to help with coding and analyses:

The charts are intended to provide a simple way to compare the evolution of COVID-19 in pairs of countries that are in different stages of the epidemic. We use the reported deaths to align the data of both countries, which allows presenting them as if they were at the same stage of the epidemic. For example, the chart below compares Brazil and Italy. When it was created, Italy was about 28 days ahead of Brazil in terms of the epidemic's progression. Brazil's line (blue) crosses Italy's line (red) at around 1,000 deaths. Judging by the trends of the death lines, Brazil is expected to experience a less severe growth in deaths than Italy did in the same time period after the disease's arrival. However, always be careful about drawing conclusions based on these trends. The epidemic's dynamic is always changing. Different countries have different means and strategies to cope with the issue, which also might change over time. For more information about relevant news in each country, check out the events timeline.

Comparison Chart

The number of deaths is currently the most accurate metric to assess the epidemic profile of a country. The number of confirmed cases varies too much in relation to the number of real cases, depending on how countries perform tests to identify infected people. Although on purpose underreporting of deaths has been suspected in some countries, the variation in death numbers is still smaller than for number of cases. For this reason, we use the number of deaths to align the curves in the charts and the events in the timelines.

The data are collected from:

Countries' epidemic statistics - Our World in Data
Timeline events - Johns Hopkins' COVID-19 Situation Reports
Brazilian cities' epidemic statistics - Brasil.io
Countries' socioeconomic statistics - The World Bank
Countries' air pollution data - Air Quality Open Data Platform
Brazilian health system data - DATASUS
Statistics for Brazilian socioeconomic variables - IBGE
Brazil's socioeconomic statistics - Atlas do Desenvolvimento Humano do Brasil

If you need these data integrated, you can find the files and more information on: Gitlab project

Currently, we only offer comparisons for countries with a difference in days greater than 14 (based on the death curves' alignment), or for countries with similar socioeconomic realities. We believe these are the most relevant combinations to analyse, but we might consider expanding the interface as the project develops.

There are many websites offering great data and analyses to follow the pandemic. Some of our favorites are: