Built in May 2020. The client application's role is to contain the UI and display it to the user. World-covid-19-data is an application to display data of cases, deaths, and recovers for each country and are known in the world, from the 8 different APIs. The client built in React, and always updated with the latest version of create-react-app (currently 4.0.3) (https://github.com/facebook/create-react-app).