Living in busy city doesn't increase chances of catching Covid, says Iran contact-tracing app data

Daily Mail - Science & tech 

Living in a busy city doesn't increase the chance of getting Covid-19, but overcrowding does, a new study reveals. AC-19, which was withdrawn from Google's app store last year over alleged concerns of government spying, tracks positive cases and deaths by geographic location. After investigating the link between density and virus transmission in the city, the researchers found that'density alone cannot be considered a risk factor'. The experts stress the difference between high urban density – a high number of people inhabiting an urbanised area – and overcrowding. The right figure shows the state of pandemic spread at the city level and the left one depicts the status at the national level.