Costa Cruises restart plan includes two new itineraries for Italian guests only, sailing to only Italian ports. Guests will only be allowed off the ship on organized shore excursions from Costa.
From September 6 to September 27, the Costa Deliziosa will depart every Sunday from Trieste, with calls in Bari and Brindisi in Puglia, Corigliano-Rossano in Calabria, Siracusa and Catania in Sicily.
On September 19, the Costa Diadema will leave from Genoa and call at Civitavecchia/Rome, Naples, Palermo, Cagliari and La Spezia.
“With the aim to allow guests to better enjoy their holidays, while respecting safety of guests, crew and local communities, the company has developed the Costa Safety Protocol for its fleet,” the company announced.

“The Costa Safety protocol is a comprehensive set of measures…….. read more here.
In my opinion it is safe to sail.
Rgds Sailor