Two websites for official information regarding COVID-related security measures and restrictions:
Information and guidance from the University of Turin.
The dedicated webpage on the website for the Italian ministry of health.
Here are the main points:
From June 1st, 2022, entry into Italy is allowed without restriction (that is, without a certificate of vaccination or cure, without PCR or antigen testing, and without a travel pre-registration requirement).
Using an FFP2 face mask is mandatory to access and use every public transportation in Italy, except for airplanes.
The use of FFP2 masks is strongly recommended in the University of Turin, and mandatory when the 1-meter distance cannot be respected.
If you start having symptoms during the conference, you should immediately get tested. In case this test returns positive for COVID, you should immediately warn both the organizing committee of the conference and the Italian medical authorities.