According to a report by Italian newspaper Corriere della Sera, the 38-year-old man was admitted to the emergency room in Codogno, Lombardy on February 19 with respiratory problems.
During the 36-hour period in which he was waiting to be seen, the patient made contact with hospital staff and visiting friends and family.
Italy's prime minister, Giuseppe Conte, appeared to admit the fault of the Lombardy hospital Business Insider reported.
He told reporters Monday: "There has been a management of the hospital not entirely proper according to prudent protocols, which are recommended in these cases, and this has certainly contributed to the spread."