Almost 99% people who have died of COVID-19 in Italy since February this year were not fully vaccinated, the National Health Institute (ISS) said on Tuesday.
The study, contained in a regular report on COVID-19 deaths released by the public health body, added that the few fully vaccinated people who died of COVID were also significantly older than those who died without full vaccination, at 88.6 years of age versus 80.
They also had more underlying health problems before contracting the virus.
Italy last week followed France in announcing that proof of vaccination or immunity from COVID-19 would shortly be mandatory for an array of activities, including indoor dining and entering places such as gyms, pools, museums and cinemas.
Since the announcement, Italian authorities have recorded a marked pick-up in vaccination bookings. To date, almost 57% of the population over the age of 12 are fully vaccinated.