Italy's health ministry traced passengers in four regions after they were identified as travelling with a woman who later died from the disease.
The passengers, who flew into Rome's Fiumicino airport, were traced across four regions - Calabria, Campania, Tuscany and Veneto - and placed in precautionary quarantine after a Dutch passenger on their connecting flight later died from the virus.
The ministry said all four remained asymptomatic and were in “good” health as of Sunday.
"I'm fine, I have no symptoms," quarantined passenger Federico Amaretti, 25, from Calabria, told Sky TG24 on Monday.
According to Italian media reports, the others under observation were a man living in the province of Naples, a woman in Florence, and a South African citizen in Padua, Veneto.
