Covid-19: what can the Rt number tell us and why is it so important?
As information that questioned the validity of the infection metrics used spread, the Ministry of Health held a press conference where FBK researcher Stefano Merler spoke to shed light on some concepts


The first of which is precisely the importance of calculating the Rt number: “It is the only one of the 21 indicators capable of helping us understand the epidemic’s trend. We often start arguing about numbers, but we forget what their real meaning is which, in our case, is being able to tell what will happen in the next two weeks. It is clearly a system that brings with it uncertainties – said our researcher – but it is the best tool available to us, solidly built over the years and widely recognized by the scientific community”.