How deadly is the new coronavirus (COVID-19) ?

Julien Riou at the University of Bern in Switzerland instead assumes all covid-19 cases among people over 80 are being detected. His team estimates that the infection fatality rate in Italy is 3.3 per cent, rising from 1 per cent among people aged between 50 and 59 to nearly 90 per cent in those aged 80 or above. For China and Spain, the overall rate is 3 per cent.