The Big Data in the service of "Contact Tracing"

CHINA. Red, Yellow or Green. The Alipay Health Code, which is obtained through the registration on the app, majorly widespread in China for online payments, is almost mandatory in order to use all the services, even the essential ones. The health code used to have access to underground railways, shopping centers and all public places needs to be color green.

AUSTRALIA. Over a million Australians have downloaded the coronavirus tracking app in the first 24 hours since its launch. According to a survey quoted by the Australian newspaper, 54% of Australians are willing to download the app on their mobile phones, thus exceeding the 40% threshold necessary to validate its effectiveness.

ITALY. Immuni App. The launch of the App is scheduled for the end of May, registration will be voluntary. The condition for the effectiveness of Immuni is to reach a substantial percentage of the population who uses it (we speak of a threshold of 60%), that is to say, equal if not superior to that of Facebook. Can we make it?