The recent COVID-19 crisis reflected a specificity of nursing homes for the elderly (NHE), both in terms of communication and in terms of managing the health crisis and its effects. This research project aims at studying these specificities along 3 complementary axes. First, we want to understand how the information was constructed to report on mortality rates in the RHE. How was the data collected, reported, aggregated? On a second axis, we aim at building a database (and mapping) of NHE according to the different variables that characterize them (status of NHE (private / public / non-profit), size, territory with differentiated regulations, supervision rate). This data base (which does not exist yet in a consolidated manner in France) will make it possible to cross-reference these data with those on mortality rates. What explanatory factors can we provide for the differences in the mortality rates observed? In a third axis, we seek to understand how, in a particular region (Hauts-de-France in France), the actors have adapted to the COVID-19 crisis in NHE. In the system of actors that had to react, we are of course thinking of the territorial regulators (what were the regulations, financing, and evaluations of the actions put in place?) but also of the NHE staff: how has the staff of these nursing homes been affected by this health crisis?