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Living in a busy city doesn t increase the chance of getting Covid-19, but overcrowding does, a new study reveals. Researchers analysed cases in Tehran, Iran, one of the early epicentres of the pandemic, using data from AC-19, Iran s national Covid detection app.  AC-19, which was withdrawn from Google s app store last year over alleged concerns of government spying, tracks positive cases and deaths by geographic location.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.  

Nabi moradpourAmir reza khavarian garmsirAyyoob sharifiHiroshima universityUniversity of tehranUniversity of isfahanStatistical centre of iranSustainable citiesStatistical centreGoogle satelliteGoogle playSmart land strategyPlay storeCorona virusஅய்யூபி ஷரிஃபிஹிரோஷிமா பல்கலைக்கழகம்