Applications that show whether you've been around a person with coronarys: How much does it work?

Contact tracking applications try to record all early when an individual has been around someone else for a considerable period of time. If a user turns positive to Avid-19 and records that fact, the app alerts other users.

Which countries have started using these applications?

Last month, Singapore released the Trace Together app using Bluetooth signals to register people and their contacts. Several other countries, including South Korea and Israel, are using similar practices. In these countries, tracking people's locations is used (GPS). The approach to use Bluetooth is being used in several European countries, such as France, Latin America, Australia, and parts of Asia.

What are the problems manifested?

Critics warn that the data of these systems is inaccurate because some phones record Bluetooth signals without being able to determine distance. So there will be contacts that have been more than six feet [2 m] away.

What's the problem with privacy?

For the most part, governments have promised that users' data would remain anonymous and the use of information limited. Yet, it is not ruled out that information should be released accidentally or deliberately and used for reasons that have no connection with David-19.

So far, data from these apps is modest, although the initiative to create platforms where users record their data about Coddy-19, or other infectious diseases, seems promising.