The idea behind the feature is to help smartphone users identify the infected areas. Google says that this is an attempt to slow down the Covid-19 pandemic. By identifying the infected area, smartphone users can make an informed decision about where to go.
Google says that the data for Covid layer is derived from multiple sources such as John Hopkins, the New York Times and Wikipedia. According to the official blog post, “These sources get data from public health organizations like the World Health Organization, government health ministries, along with state and local health agencies and hospitals. Many of these sources already power COVID case information in Search, and we’re now expanding this data to Google Maps.”
To make the user interface easy to read and understand, Google has included colour-coding to Maps. Grey area marks less than 1 case, Yellow is for 1-10 cases, Orange highlights 10-20 cases, Dark Orange is for 20-30 cases, Red area marks 30-40 cases, and Dark Red marks 40+ cases.
The tool is designed as a means to show critical information about Covid-19 cases in an area. Users can also see a seven-day average on new Covid cases per 1 lakh people. The layer button is on the top right corner, you can simply click on Covid info to learn more.